Check the data sources behind PPC agencies agency reviews

Start by identifying what is uncertain: the review platform, the agency's own claim, the supporting source, or the proposed work. Follow the matching route below. Keep the source type and date beside every claim, and do not let a repeated statement become evidence simply because it appears in several places.

If the platform cannot explain its review checks

If the platform cannot describe how it checks feedback or identifies paid placement, reduce the influence of its ratings. Ask how reviews are gathered, what status labels mean, how reviewers are checked, and whether listings identify sponsored or featured positions before relying on a score.

Trustpilot's Verified label applies to reviews collected through its invitation system; Clutch says its research team interviews reviewers. A Google account alone does not prove that a reviewer was a client. Compare status wording and verification methods across Trustpilot, Clutch, G2 and Google Reviews, recording any disclosed paid placement.

Rule of thumb: give a rating only the weight warranted by clear review checks and commercial disclosures. When the platform's answers remain vague, use its feedback to frame questions, not to rank agencies or treat review volume as proof of delivery.

If you have ratings but no supporting evidence

If ratings are the only material you have, use them to identify agencies for further checks, not to choose where your budget goes. The review methodology explains how to read a review method, while reviews comparison methods provide a way to compare ratings on common terms.

A score without a stated method is opinion rather than proof of delivery. Check the platform's review-status labels, its verification process and any disclosure of paid placement before treating a high rating as meaningful. Even a credible-looking review cannot establish that an agency will achieve similar results for your account or business.

Rule of thumb: treat ratings as prompts for questions and possible candidates, then require evidence beyond the platform before relying on performance, client-retention or fit claims. If verification or payment disclosure is unclear, lower the rating's influence rather than treating review volume as a substitute for evidence.

If the agency supplied the performance claim

If the agency supplied a claim about its own success, label it as a vendor statement and ask what independent record could test it.

Its case studies may be accurate, but the supplier chooses what to publish; a dated client reference or a filed record offers another way to check what has been said.

For financial claims, search Companies House and check that the company number matches the trading name. A claim about account results needs evidence of its own: figures and reporting context are not interchangeable, as explained in the article on reporting metrics. A filed record can help verify a business, but does not by itself establish campaign performance.

If a bid cites legislation, check the named source rather than accepting the citation at face value. The Climate Change Act 2008 is climate legislation, not advertising law. For advertising claims, check the ASA and CAP Code; for consumer-protection questions, consult UK regulations and data. The current regime described here is the Digital Markets, Competition and Consumers Act 2024; the Consumer Protection from Unfair Trading Regulations 2008 is the former regime.

Rule of thumb: treat a supplier's account of its own success as a claim until a dated, relevant source supports it. Check legal references against the named regulator or legislation, and do not mistake a company record, award or polished case study for independent confirmation of results.

If you cannot trace a claim to a source

If a claim has no clear source, record the gap rather than filling it with an assumption. Use a consistent sequence to separate what the agency says from what can be checked independently, then decide whether the remaining uncertainty matters to your shortlist or needs a further question.

Keep the source label beside each claim so that a vendor statement does not become an apparent fact merely by being repeated. The compliance guide can help distinguish regulatory material from supplier assertions when you assess claims about compliance.

Rule of thumb: an unverified claim stays unverified, however often it appears. Keep its source, date and evidence status visible, and use unresolved points to shape a follow-up question or a tightly scoped test rather than quietly treating them as confirmed.

If the agency describes how it will manage paid search

If an agency explains its proposed platform practice, compare that explanation with published guidance and ask for an account you can assess. You cannot inspect the account structure before contracting, but you can ask how the team plans to handle tracking, budgets and search terms in relation to your needs.

Google's published guidance on success with Google Ads can serve as a question bank, not a scorecard. Ask how conversion tracking, budget pacing and search-term review will be handled, then compare the answers with your requirements. The measurement and reporting guide and tool implementation guidance offer related checks on delivery and access.

Rule of thumb: judge the clarity and relevance of the agency's answer, not whether it repeats platform terminology. A clear explanation gives you something to test later; vague assurances about platform practice are a reason to ask for a more specific account of the proposed work.

If important uncertainty remains after your checks

If public records and review checks do not resolve a material uncertainty, consider whether a pilot with a fixed budget and period could answer a limited question.

It can test whether the team delivers a defined task to an agreed standard, but cannot establish long-term retention or prove performance at scale.

Set the brief before pitches arrive so every supplier responds to the same task. If the pilot concerns spend, clarify its budget and duration using the agency cost guide. If it tests reporting or account access, use the product comparison to structure those checks alongside delivery.

Rule of thumb: use a pilot to test defined work, not to promise future results. Agree the task, budget, period and standard in advance, then judge what the pilot demonstrates without extending its evidence to questions it was not designed to answer.