How to clean up the memory occupied by other Apple phones?

Here, taking the iPhone 7 mobile phone as an example, the cleaning method is as follows:

First, click "Settings" on the mobile phone desktop, as shown in the figure.

2. After entering the phone setting interface, drop down the menu and select the "Safari" option, as shown in the figure.

Third, open "Clear History and Website Data" in Safari interface, as shown in the figure.

4. Finally, click "Clear History and Data" in the prompt menu that pops up, as shown in the figure.