Because you have set up your web data stream your website is already feeding that to your Google analytic property you noticed that an asked measurement is enabled for the web data stream what happens when the setting is enabled the first option is additional event are collected from your website without you needing to change your website code the second option is event from your mobile app can be combined with existing website data the third option is event can be associated with signed in user to enable cross device reporting the fourth option is reporting to the data stream user machine learning to distribute credit across channel credit across channel