How to Hire a Google Ads Specialist: Interview Guide

Google Ads is one of the most effective channels for driving qualified leads and sales — but only when managed by someone who genuinely knows what they are doing. A skilled Google Ads specialist can turn every dollar of ad spend into measurable revenue. An unskilled one can burn through your budget in days with nothing to show for it.

The challenge when hiring is that Google Ads proficiency is difficult to assess from a CV alone. Certifications prove someone passed an exam, not that they can manage real campaigns profitably. Portfolio screenshots can be fabricated. Even interview answers can be rehearsed from YouTube tutorials without any hands-on experience.

This guide focuses on the interview process — the questions, scenarios, and evaluation frameworks that separate genuinely skilled Google Ads professionals from those who merely talk a good game. Whether you are hiring in-house or evaluating agency partners in Singapore, these techniques will help you identify the right person to manage your Kempen Google Ads.

Certifications: What They Do and Do Not Tell You

Google offers several certifications through its Skillshop platform. Understanding what each certification covers — and its limitations — helps you set appropriate expectations.

Google Ads Search certification: Covers search campaign creation, keyword targeting, bidding strategies, and ad extensions. This is the baseline certification and the most relevant for most businesses. A specialist without this certification raises questions about their commitment to the platform.

Google Ads Display certification: Covers display campaign management, audience targeting, responsive display ads, and remarketing. Important if your strategy includes brand awareness or remarketing campaigns.

Google Ads Video certification: Covers YouTube advertising formats, targeting options, and campaign measurement. Essential if video advertising is part of your marketing mix.

Google Ads Shopping certification: Covers product feed management, Shopping campaign structure, and Performance Max campaigns. Critical for e-commerce businesses.

Google Ads Measurement certification: Covers conversion tracking, attribution models, and Google Analytics integration. This is arguably the most important certification because measurement underpins everything else.

What certifications do not tell you: Certifications confirm theoretical knowledge, not practical ability. The exams can be passed by studying material for a few days without ever managing a real campaign. A certified specialist may not know how to diagnose a suddenly underperforming campaign, negotiate with a client about budget allocation, or make judgment calls that require experience. Use certifications as a baseline filter, not as proof of competence.

Campaign Management Experience to Look For

Experience matters more than credentials in Google Ads. Here is what to probe for during the evaluation process:

Budget management: Ask about the largest monthly budget they have managed. A specialist who has managed SGD 5,000 per month may struggle with a SGD 50,000 account. Larger budgets require different strategies, more granular segmentation, and greater comfort with data-driven decision making.

Campaign types: Determine which campaign types they have hands-on experience with. In 2026, the key types include Search, Performance Max, Display, Video (YouTube), Shopping, and Demand Gen campaigns. A well-rounded specialist should have experience with at least Search and Performance Max.

Industry exposure: Ask about the industries they have worked in. A specialist who has only managed campaigns for e-commerce may not understand the nuances of B2B lead generation, and vice versa. Prior experience in your industry is valuable but not essential — strong fundamentals transfer across verticals.

Account structure philosophy: How a specialist structures accounts reveals their strategic thinking. Ask about their approach to campaign organisation, ad group segmentation, and keyword match type strategy. The best specialists can articulate why they make structural decisions, not just describe what they do.

Optimisation cadence: A good specialist has a structured approach to account optimisation — daily checks for anomalies, weekly bid and budget adjustments, monthly strategy reviews, and quarterly restructuring. Ask about their typical optimisation routine and the tools they use to support it.

Interview Questions That Expose Real Expertise

These questions are designed to go beyond rehearsed answers and reveal genuine understanding. Pay attention not just to what candidates say, but how they reason through problems.

Fundamentals and strategy:

  • “Explain Quality Score to me as if I had never heard of it. What factors influence it, and why does it matter?”
  • “How do you decide between broad match, phrase match, and exact match keywords for a new campaign?”
  • “Walk me through how you would structure a Search campaign for a business with 50 different services.”
  • “What is your approach to bid strategy selection? When would you choose manual CPC over Target CPA?”

Problem-solving:

  • “Our cost per lead has doubled over the past month. Walk me through your diagnostic process.”
  • “A client wants to launch in a new market but has a limited budget. How do you prioritise spending?”
  • “You notice that one campaign is spending 80 per cent of its daily budget by noon. What do you do?”
  • “Conversions are being recorded in Google Ads but not in the CRM. How do you troubleshoot this?”

Advanced knowledge:

  • “How has Performance Max changed your approach to campaign management? What are its strengths and limitations?”
  • “Explain how Google Ads auction works, including how Ad Rank is calculated.”
  • “How do you approach audience layering in Search campaigns?”
  • “What is your experience with offline conversion tracking, and why is it important?”

Singapore-specific context:

  • “How do you handle multilingual campaigns targeting English and Mandarin speakers in Singapore?”
  • “What challenges have you encountered with location targeting in a small geographic market like Singapore?”
  • “How do you account for Singapore’s public holidays and cultural events in campaign planning?”

Test Scenarios for Practical Evaluation

Practical tests reveal more than any conversation. Here are test scenarios you can use to evaluate Google Ads specialists:

Scenario 1 — Campaign audit (2 hours): Share a Google Ads account (or anonymised screenshots showing campaign structure, keywords, ad copy, and performance data). Ask the candidate to identify the top five issues and recommend specific improvements. This tests analytical ability and prioritisation skills.

Scenario 2 — Campaign plan (2-3 hours): Provide a business brief with product details, target audience, budget (say SGD 10,000 per month), and objectives. Ask the candidate to create a campaign plan including account structure, keyword research, ad copy drafts, bidding strategy, and projected performance estimates. Evaluate the thoroughness and realism of their plan.

Scenario 3 — Live account walkthrough (30 minutes): If the candidate currently manages campaigns, ask them to share their screen and walk you through an account they manage (with client permission, of course). Ask them to explain their structural decisions, show recent optimisations, and discuss results. Real-time walkthroughs are nearly impossible to fake.

Scenario 4 — Data interpretation (30 minutes): Present a spreadsheet of campaign performance data spanning three months. Ask the candidate to analyse the data, identify trends, and recommend three actionable changes. This tests their ability to extract insights from numbers — a critical daily skill.

Compensate candidates for any test that takes more than one hour. SGD 150 to SGD 300 is appropriate for a multi-hour exercise and demonstrates respect for their professional time.

Performance Metrics Every Specialist Should Discuss

A competent Google Ads specialist should be fluent in these metrics and understand how they interact. During interviews, ask candidates to define each metric and explain when they prioritise one over another.

Core efficiency metrics:

  • Cost per click (CPC): The price of each click. Important for budget management but meaningless without conversion context
  • Click-through rate (CTR): The percentage of impressions that result in clicks. Indicates ad relevance and creative effectiveness
  • Conversion rate: The percentage of clicks that result in a desired action. This is where campaign management meets landing page optimisation
  • Cost per acquisition (CPA): The total cost of acquiring one customer or lead. The most important efficiency metric for most businesses

Return metrics:

  • Return on ad spend (ROAS): Revenue generated per dollar of ad spend. Essential for e-commerce and businesses that can attribute revenue directly to ads
  • Customer lifetime value (CLV) to CPA ratio: The relationship between what you pay to acquire a customer and what that customer is worth over time. Sophisticated specialists factor this into their bidding decisions

Quality metrics:

  • Quality Score: Google’s assessment of keyword, ad, and landing page relevance. Higher scores lead to lower CPCs and better ad positions
  • Search impression share: The percentage of eligible impressions your ads actually receive. Reveals missed opportunities due to budget or rank limitations
  • Invalid click rate: The percentage of clicks Google identifies as fraudulent or accidental. Unusually high rates may indicate click fraud requiring investigation

A strong candidate does not just know these metrics — they understand the relationships between them. For example, they should explain how improving Quality Score reduces CPC, which lowers CPA, which increases the number of conversions achievable within a fixed budget.

Red Flags in Google Ads Candidates

Watch for these warning signs that indicate a candidate lacks the depth of expertise needed to manage your campaigns effectively:

  • Cannot explain the auction: If a candidate cannot clearly articulate how the Google Ads auction works, including Ad Rank calculation and the role of Quality Score, their foundational knowledge is insufficient
  • Over-reliance on automation: Automation tools like Smart Bidding are powerful, but a specialist who cannot manage manual campaigns does not truly understand the platform. Ask what they would do if automated bidding was not delivering results
  • No conversion tracking expertise: A specialist who has never set up conversion tracking, configured Google Tag Manager, or debugged tracking issues is missing a critical skill. Without accurate tracking, all campaign optimisation is guesswork
  • Obsession with clicks over conversions: Driving clicks is easy. Driving profitable conversions is hard. Candidates who talk primarily about traffic volume rather than conversion quality and cost-efficiency are thinking at the wrong level
  • No experience with negative keywords: Negative keyword management is one of the most impactful optimisation levers. A specialist who cannot discuss their negative keyword strategy or provide examples of wasted spend they have eliminated is leaving money on the table
  • Resistance to testing: The best Google Ads specialists are compulsive testers — ad copy variations, landing pages, bidding strategies, audience segments. Candidates who describe a “set and forget” approach will waste your budget
  • Cannot discuss failures: Every PPC professional has campaigns that underperformed. Candidates who only share success stories are either inexperienced or dishonest. Ask specifically about a campaign that did not meet targets and what they learned

Salary Expectations and Hiring Models

Google Ads specialists in Singapore command competitive salaries, particularly at senior levels where the direct revenue impact of their work is measurable. Here are 2026 benchmarks:

In-house roles:

  • Junior PPC executive (1-2 years): SGD 3,500 to SGD 4,500 per month
  • Google Ads specialist (2-5 years): SGD 4,500 to SGD 7,000 per month
  • Senior PPC manager (5-8 years): SGD 7,000 to SGD 10,000 per month
  • Head of paid media (8+ years): SGD 10,000 to SGD 15,000 per month

Freelance rates: SGD 80 to SGD 200 per hour, or monthly retainers of SGD 1,500 to SGD 5,000 depending on account complexity and ad spend managed.

Agency model: Agencies typically charge 10 to 20 per cent of ad spend as a management fee, with minimum monthly fees of SGD 1,000 to SGD 3,000. This includes campaign management, reporting, and strategic recommendations. A specialist digital marketing agency brings team depth, cross-client learnings, and established optimisation processes.

When deciding between hiring models, consider your monthly ad spend. For budgets under SGD 10,000 per month, an agency or freelancer typically provides better value because a full-time specialist would be underutilised. For budgets above SGD 30,000 per month, an in-house specialist begins to make financial sense, especially when combined with SEO and social media advertising responsibilities.

For EP applications when hiring foreign Google Ads specialists, ensure the salary meets MOM’s minimum qualifying thresholds. Under the COMPASS framework, your offer must score sufficiently across salary, qualifications, diversity, and local employment support criteria.

Soalan Lazim

Are Google Ads certifications mandatory for a specialist?

No, certifications are not legally required, but they indicate baseline knowledge and a willingness to invest in professional development. The Google Ads Search and Measurement certifications are the most relevant. However, never hire based on certifications alone — practical experience and demonstrated results matter far more than exam scores.

How much Google Ads experience should a specialist have?

For most in-house roles, two to three years of hands-on campaign management is the minimum for independent work. Specialists with less experience need supervision and mentorship. For senior or strategic roles, five or more years of experience across different industries and campaign types provides the breadth needed to handle diverse challenges.

Should I hire a Google Ads specialist or use an agency?

Use an agency if your monthly ad spend is below SGD 15,000, if you lack internal expertise to manage and evaluate a specialist, or if you need rapid results without a lengthy hiring process. Hire in-house if your ad spend exceeds SGD 30,000, if Google Ads is a primary revenue driver, or if tight integration with your sales team is critical. Many businesses start with an agency and transition to in-house as the channel matures.

What tools should a Google Ads specialist know?

Beyond the Google Ads platform itself, a competent specialist should know Google Analytics 4, Google Tag Manager, Google Ads Editor (for bulk changes), and Google Looker Studio (for reporting). Familiarity with third-party tools like SEMrush or SpyFu for competitive analysis, and call tracking solutions for phone-based conversions, adds significant value.

How do I evaluate a Google Ads specialist’s performance after hiring?

Set clear KPIs from day one. Common metrics include cost per acquisition (CPA), return on ad spend (ROAS), conversion volume, and search impression share. Review performance monthly against targets, but allow a ramp-up period of one to two months for the specialist to audit, restructure, and optimise your account before expecting meaningful improvements.

What is the biggest mistake companies make when hiring a Google Ads specialist?

Hiring based on certifications and interview charisma without testing practical skills. A well-designed test scenario — such as auditing a real account or creating a campaign plan from a business brief — reveals more about a candidate’s capability than any number of interview questions. Always include a practical component in your hiring process.