Simply head to the Find My Device website, log in with your credentials, select your lost phone (if you have multiple devices), and it should pop up on the map. The only time this doesn’t work is...
In this tutorial, you can read a review of the top-rated free phone tracker apps. You should note that the free apps listed here, all have the basic features of tracking your mobile phone. You can also upgrade to a paid version for advanced features for tracking activities on a mobile device.