Because of the way Safari for iOS displays tabs in a vertical array, the amount of open tabs in the browser can often get out of hand, and sometimes number in the tens or even hundreds.
However in iOS 13, Safari will offer to automatically close tabs that have not been viewed recently after one day, one week, or one month. The new Safari function can be changed later in the Settings app.
Apple unveiled iOS 13 last week at WWDC. The newest version of the operating system for iPhone (and the iPad, though the iPad version has been renamed to iPadOS) introduces a long list of new features and some changes that are quite exciting. Be sure to check out the video above for more.