We're going to assume that most How-To Geek writers know how to delete the history, cookies, and cache in Mobile Safari, but just in case you don't know, here is how to do it.

Open up the Settings app and find Safari in the left-hand list, and then scroll down the right side until you find the "Clear History and Website Data" button.

You'll be prompted to verify that you really want to do this, and it will point out that this is also going to delete the history from other devices using your iCloud account to sync Safari.

Related: How to Clear Cookies / Cache for a Single Website on iPhone or iPad

Perhaps this is a good time to point out that you should use private browsing mode if you don't want history being saved on your device!