What causes collisions when saving multiple elements into a single bucket of a Map hash table?

Collisions in a hash table Map in Go occur when different keys have the same hash value, causing them to fall into the same bucket. This happens because the hash function converts the key into a bucket index, and with a limited number of buckets, different keys can have the same index. As a result, multiple elements are stored in one bucket, which requires additional handling (such as a linked list or another structure) to resolve collisions.