How to Audit a Digital Marketing Agency

Most businesses hire a marketing agency and then have no practical way to check the work. The agency runs the accounts, writes the reports, and interprets the results. That arrangement is normal. It is also exactly why an independent review is worth doing periodically, even when nothing seems obviously wrong.

This is a framework for that review — what to ask for, what to look at, and what an independent audit adds if you decide to bring one in.

Start with account access, not the report

Before looking at a single number, find out who actually owns and controls the accounts your marketing runs on: the Google Ads account, the GA4 property, the Google Business Profile, the CMS, the domain registrar. Ownership and administrative access should sit with the business, not exclusively with the agency.

If you cannot get a straight answer about who owns an account, or you have never personally logged into it, that is worth resolving before anything else on this list.

Request the raw reporting, not the summary

Ask for read-only or reporting-level access to the platforms themselves — Google Ads, GA4, Search Console, the CRM — rather than relying solely on a monthly PDF. A summary report reflects choices about what to include and how to frame it. The underlying platform data does not.

Check whether the reporting reconciles

Compare what the agency reports against at least one other source:

What the agency reports	Compare against
Leads generated	CRM lead records
Conversions	GA4 or the ad platform’s own conversion data
ROAS or revenue	Actual sales or bank deposits
Traffic growth	Google Search Console

If two sources describing the same activity tell noticeably different stories, that gap is worth understanding before you draw any conclusion about performance.

Not sure whether your own reporting reconciles cleanly? Our Tracking & Attribution Audit is built specifically for this question.

Review campaign and account structure

You do not need to become a PPC or SEO specialist to notice basic red flags: campaigns that have not been touched in months, search terms with no obvious connection to your business, or SEO work with no visible content or technical changes to show for it. Ask for a change history if the platform supports one — most do.

Ask about lead quality, not just lead volume

A rising number of leads means little if a growing share of them are unqualified. Ask the agency how it defines a qualified lead, and compare that definition against what your sales team actually experiences.

Review the contract against the work

Pull the original scope of work or contract and compare it, line by line, against what has actually been delivered over the same period. Vague contract language (“ongoing SEO optimization,” “campaign management”) makes this harder — which is itself worth noting for the next agreement.

What an independent audit adds

Doing this yourself is possible, but it takes time, platform familiarity, and a willingness to ask pointed questions of a vendor you may need to keep working with. An independent audit performs the same review with no stake in the outcome, documents what it finds in writing, and gives you language to bring back to the agency if something needs to change.

An audit is not a verdict against the agency before it starts. In plenty of cases, the finding is that the work is solid and the reporting holds up. The value is in knowing that for certain, one way or the other.