Google Analytics has introduced more flexible conversion lookback windows, giving advertisers finer control over how long a click or an engaged video view can receive credit for a conversion.
It sounds like a small settings change. In practice, it can affect the conversion totals and campaign comparisons that a business sees in Google Analytics and Google Ads. For businesses in Bath and across the South West, the useful response is not to pick a new number immediately. It is to check whether the current window reflects how customers actually make a decision.
What has changed?
According to Search Engine Land’s report on the update, advertisers can now set custom whole-number lookback windows for two types of conversion:
- Click-through conversions: any period from one to 90 days, replacing the previous selection of preset windows.
- Engaged-view conversions: any period from one to 30 days, replacing the previous fixed three-day window.
The settings are available in Google Analytics under Advertising, Conversion management and Settings. They can also be managed through the linked Google Ads conversion interface.
A lookback window answers a fairly simple question: how far back should the platform look for an advertising interaction when a conversion happens? If somebody clicks an advert and enquires 20 days later, a 30-day click window can credit that journey. A 14-day window cannot.
Why the right window depends on the business
There is no universally correct attribution window. A restaurant booking, an emergency repair and an online purchase may happen within hours or days. Choosing an architect, professional adviser, training provider or business-to-business supplier may take several weeks.
That matters locally because the South West has a broad mix of tourism, hospitality, retail, professional services, trades and longer-consideration business services. Applying the same window to all of them can produce an unhelpful picture.
A window that is too short may undercount advertising’s contribution to considered purchases. One that is too long may give an old advert more credit than it deserves. The new flexibility makes closer alignment possible, but it also creates more room for arbitrary choices.
Do not use the setting to make performance look better
Changing the window can change reported conversions without changing a single customer’s behaviour. A longer window may capture more conversions; that does not mean the campaign suddenly improved.
For that reason, businesses should avoid adjusting the number simply to lift the figures in a report. The setting should follow evidence about the customer journey. It should not be used as a lever to reach a preferred return on advertising spend.
If you change it, record the date and the reason. Add an annotation to internal reporting and avoid making a careless before-and-after comparison across the change. This is part of sensible Google Ads management: measurement definitions need to stay visible alongside campaign results.
What to check now
- Review the current settings. Confirm which click-through and engaged-view windows are in use rather than assuming the defaults are suitable.
- Look at time to conversion. Use your analytics, customer relationship management system and sales records to estimate the usual gap between first advertising contact and enquiry or sale.
- Separate different conversion types. A phone call, brochure download, online sale and signed contract do not necessarily have the same decision cycle.
- Check linked platforms. Make sure the people responsible for Google Analytics and Google Ads understand the chosen definition and are not comparing reports built on different assumptions.
- Preserve a benchmark. Export or note the relevant figures before changing the window, then explain the measurement change in future reports.
Businesses should also check that the underlying conversion events are meaningful. A perfectly chosen lookback window cannot rescue duplicate tags, accidental page-view conversions or forms that do not record reliably. Measurement hygiene comes before attribution fine-tuning.
A useful refinement, not a measurement cure
The update gives advertisers welcome control, especially where a real buying cycle falls between Google’s former presets. A business with a typical 21-day consideration period no longer has to choose between 14 and 30 days.
But attribution remains a model of the customer journey, not a complete account of it. People may see organic search results, return directly, speak to colleagues or encounter offline recommendations before converting. The number in Analytics is useful evidence, not absolute truth.
For Bath and South West organisations, the practical opportunity is to make reporting better match reality. Choose a window based on how customers buy, document the decision and keep it stable long enough to support meaningful comparisons. If the wider measurement setup needs attention, a joined-up search marketing approach is more valuable than endlessly adjusting one attribution control.
