Delete specific Google services or your Google Account. If you're no longer interested in using specific Google services, like Gmail or YouTube, you can sign in to your Google Account to delete them. You can even delete your entire account and all your data, like emails and photos.
Families Create a family group with up to six family members and get the most out of Google, together. Get Started. Family Link. Create a Google Account for your kid, and stay in the loop as they explore on their device. Learn More. YouTube Music Premium family plans. Google Product Forums If you want to delete all of your photos from your Google Photos account, first turn off "back up & sync" so that you don't delete the device copies of your photos. I'd also suggest double-checking to make sure you have the photos you want to keep stored safely on your computer and possibly an external hard drive. How to See and Delete Your Google History | HowStuffWorks
How to remove your old phone from Google Play | AndroidPIT
How to delete mobile device copy but keep backup - Photos T he Google Photos App is a Sync application that uploads a copy of your device photos into Google Photos cloud storage, then keeps the device copy and the cloud copy synchronized so they stay the same. If one is edited or deleted in Google Photos, the same operation happens to the other copy. For this reason, you should not delete photos to Trash in Google Photos, because this will delete Google History: How to delete all your data Android Authority
Google is listening: Here's how to delete your voice
You don't recognize a device. You might not recognize activity that was actually you if: You started using a new device. You used someone else's device or a public computer, like at a library. Learn how to sign out on a public device you're no longer near. You recently reset your device to factory settings. The device could still show up. Find My Device - Google Search Find My Device makes it easy to locate, ring, or wipe your device from the web.