First interaction gives credit for a A conversion is reported whenever a user completes a goal or makes a purchase during a session. Each goal will report a maximum of one conversion per session, while every transaction is reported. See also goal completion and ecommerce transaction.... Always-R Glossary to the first method that somebody used to find your website. The ‘Model Comparison Tool’ allows you to apply the first interaction (and other Attribution allows you to control how credit for a particular conversion is given to the marketing channels that led to the action taking place. Google Analytics provides a variety of attribution models in the ‘Multi-Channel Funnels’ and ‘Attribution’ reports. Attribution takes into account the channels (and traffic sources) used across multiple sessions for a user. You can set the amount of historical data included in the reports using the lookback window. See also first interaction and last interaction.... Always-R Glossary models to your conversions). It’s important to know that there is a limit to the amount of historical data included in the attribution reports (see The lookback window allows you to control the amount of historical data that is included when using the attribution reports. For example, setting a lookback window of 14 days will include touchpoints up to 14 days before the conversion occurred. Any touchpoint outside of the lookback window won't be included in the report. The default lookback window is 30 day, but it can be set between 1 and 90 days. See also attribution.... Always-R Glossary). There will also be other impacts on first interaction data, for example, people clearing their cookies or using multiple devices.