When using a web browser via a tablet and or smartphone, it saves some information from its website to its cache and cookies. Clearing the cache can fix certain issues like long load times.
Clearing cache and cookies will remove settings that were previously in place. For example, if you were signed in to some websites, you will be required to sign back in on your next visit.
Tablet and SmartPhone (iOS)
On your device, open Settings
Tab the General tab
Scroll all the way down and tap the Transfer or Reset iPhone button
Tap Reset at the bottom
Tap the Reset Network Settings option
Enter your iPhone's passcode to confirm reset
Cookies are files that are created after visiting websites. They are designed to better your online experiences by saving browsing data, decreasing the amount of time it takes to load the pages in the future.
Caches are what remember certain elements of the pages you visit, for example, images, and help with the total amount of time it takes to reload these images on your next visit.