There are many ways of storing data when writing a computer program especially when it's a group of data that share the same property. Like the data of students under the age of 12 or People who love same category of movies. This can be store as an array or a slice into the memory but sometime you just want some that is very simple to work with when the data get massively large to go through. Cases like this are when linked list comes to play. It essentially just a sequence elements where one element links to the next element.