What is the importance of cache memory on phones and computers, and how does it work?

Question

What is the importance of cache memory on phones and computers, and how does it work?

In: Technology

Answer 1

Cache is simply temporary data storage. Lets say you have an app which fetches some data from the internet to load a grid of profile cards. Its inefficent to load these items every time you open the page, since the user already has this data from the previous load. Instead, you can store (cache) the data on disk to make load times faster (no need to fetch from the internet) and prevent strain on your servers. Thats one example of how cache is often used.