What is the main advantage of using linked lists compared to arrays ?

Arrays are stored in contiguous memory and provide O(1) random access by index, but resizing an array or inserting in the middle can require moving many elements. A linked list stores elements as separate nodes connected by links, so it can grow and shrink dynamically and insertions or deletions can be done by updating links when the position is known. Therefore, the main advantage of linked lists over arrays is dynamic size manipulation.