Open the Settings app
Tap Safari
Tap Clear History and Website Data
Tap Clear History and Data to confirm
To clear specific site data only, tap Advanced
Tap Website Data
Tap Remove All Website Data
To clear browsing history in Safari, open Safari
Tap the Bookmarks icon
Tap History
Tap Clear
Choose the time range you want to clear
To remove a single site, swipe left on the entry in History
Tap Delete