In a post on Google’s blog, they have announced that they will be enabling automatic deletion by default. This means that after 18 months, all your data will be deleted automatically without any input on your part. This will cover your search history (either on the web or in-app), your location history, as well as voice commands that are collected through Google Assistant or other Google Assistant enabled devices.
This auto-deletion feature will be enabled by default only for new users. If you’re an existing user, you will still need to turn it on manually, but Google states that they will be promoting the option on its search page and on YouTube to encourage users to turn it on. 18 months will be the default period that is set, but users who dive deeper into the settings will have the option of choosing a shorter period of 3 months, or they can opt to manually delete their data as and when they need.
How to automatically delete Google location history
Go to the Data & Personalization page on Google’s website.
Select either Web & App Activity or Location History