You are able to specify the frequency at which GPS data should be collected. What frequency you choose is dependent on specific use cases.

Typically for an outdoor event venue (for example, a music festival or sports ground), we recommend every 30 seconds for the site area (green circle) and every 10 minutes for the nearby area (yellow circle). as illustrated here:

However, if the nearby area is large and lower granularity is all that is needed (e.g. to tell if app users are making a journey to the event site) then the frequency should be reduced - perhaps to as low as every 30 minutes.   

The full list of options is set out in this article on GPS activation locations.