# Recommended Events

We suggest you implement as many of these recommended event as make sense for your app's user experience. 

Over time, we plan on adding built-in optimization options, which take into account user engagement history including these events. By tracking these events from the beginning of your integration, you'll have more data for your own optimizations/conditions, and will be able to take advantage of our new optimizations as they become available.

<table><thead><tr><th width="237">Name</th><th>Description</th></tr></thead><tbody><tr><td>signed_in</td><td>When the user logs into your app with existing credentials.</td></tr><tr><td>log_out</td><td>When the user logs out of your app.</td></tr><tr><td>sign_up</td><td>When the user completes the sign-up flow for a new account.</td></tr><tr><td>in_app_purchase</td><td>When the user completes an in app purchase of a digital good (unlock feature, etc)</td></tr><tr><td>subscribe</td><td>When the user subscribes to a recurring payment  plan / subscription.</td></tr><tr><td>unsubscribe</td><td>When the user cancels a recurring payment  plan / subscription.</td></tr><tr><td>search</td><td>When the user searches in your app.</td></tr><tr><td>tutorial_complete</td><td>When the user completes your app's tutorial or onboarding.</td></tr><tr><td>add_to_cart</td><td>For shopping apps with a cart.</td></tr><tr><td>physical_purchase</td><td>For when the user makes a purchase of a physical item (not in app digitual purchase).</td></tr><tr><td>level_up</td><td>For games, when the user levels up.</td></tr></tbody></table>