I am building a website with node.js express webserver and i use Mongo db database.
On my website people can register a profile they can upload pictures and write text.
Now i hear often that many things can be load from a cache then the website run faster.
Now i ask myself if i need to code something into my script to make for example the Mongo db use cache for requests or if i need to code anything to make the browser or webserver to use pictures from cache.
Can somebody help me to understand this cache thing?