The technique to use is called "sync", for synchronise.
I use sync on my Kobo account, so whether I read on my tablet or my Kobo the bookmarks are updated on both. When downloading books it is easier to go shopping on my tablet, and the Kobo will automatically sync and fetch my paid-for books from the Kobo store.
Google has automatic sync available for syncing mail, data, apps etc, see this link:
How To Sync Or Transfer Data From One Android Device To Another