Cookies are the data files that are created to store your history of any web browser. The details are stored when you visit any website so that it can save your login information, location, your preferences and many more. But it will make your iphone slower. If you want to make your iphone faster than before then you have to delete cookies on iphone. Well deleting cookies on iphone is a very simple and easy task. You can find more information about it in our blog.