What are visitors and their sources?

Visitors are unique visitors to your app store page. 

We use your Google Analytics data to attribute unique visitors to the source/keyword of their first visit to your app store page. 

This attribution stays with users for as long as we can identify them. It means that if the user installs and becomes a paying customer sometime in the future, the conversion will still be attributed to the original source/keyword the installing user originally came from.