What attribution models does an SEO company use?

In Google Analytics 4, the choice is narrower than some reports suggest: the attribution models available are data-driven attribution and two last-click models. An attribution model is the rule that decides which visit gets credit when someone converts after several visits from different channels, and the model chosen changes how much credit organic search receives. A careful SEO company tells you which model your property uses, explains what it does with direct visits and earlier touches, and shows organic search’s role in more than one view rather than relying on a single figure.

The models available in Google Analytics

Google Analytics’ guide to getting started with attribution lists three models: data-driven attribution, paid and organic last click, and Google paid channels last click. Data-driven attribution uses your account’s data, evaluating both converting and non-converting paths, to estimate each click’s contribution. Paid and organic last click gives all the credit to the last channel the person clicked through before converting. The first-click, linear, time-decay, and position-based models that older reports and articles describe were removed from Google Analytics in November 2023, so a proposal that offers them as options in GA4 is out of date.

What happens to direct visits

One detail changes how the numbers read. The same guide states: “All attribution models exclude direct visits from receiving attribution credit, unless the path to key event consists entirely of direct visits.” If someone finds you through organic search and later returns by typing your address, the attribution models give the credit to organic search, not to the direct visit. That is different from what an acquisition report shows about where sessions came from, so the company should say which kind of report a figure comes from.

The lookback window

Credit can only reach visits within the lookback window. Google Analytics’ guide to attribution settings sets the default at 30 days for acquisition events, such as a first visit, and 90 days for other key events, with 30 or 60 days available instead. For a business where people research for months before buying, a shorter window gives organic search less credit for early visits, so the setting should match your sales cycle and be stated in reports.

Why last click can undervalue SEO

Organic search can do early work: it introduces a business, answers research questions, and earns enough trust that the person comes back. Under a last-click view, a later paid click takes the credit. Some discovery also leaves no trace in analytics, such as a recommendation, an AI answer that names you without sending a visit, or a mention seen elsewhere that leads someone to type your address. No model captures all of this, which is why the company should show organic search as the last click, its role earlier in the paths that lead to key events, and the trend in branded searches, rather than one number presented as precise.

Naming the model and window in every report

The report should name the attribution model and lookback window in use, show organic search’s key events under that model, and explain any change of settings, since a change of model changes how credit is counted. A company that reports organic conversions without saying how they were attributed is giving you a number without its meaning.