Linked lists have been around since the 1950's, are they still relevant? Absolutely!
Linked lists are a great data structure for tasks like building queues or stacks, implementing functionality like forward/back in an image viewer or music player or browser, or for implementing more complex data structures like a Fibonacci heap. Linked lists also offer some performance increases for working with your data compared with an arrays.
It’s a way to store data in a list format, the ‘linked’ part describing how the data stored in each node (an object) is linked to other nodes sequentially.
In it’s simplest form…