A Bitcoin address is like a traditional bank account number. The difference between bank account number and a Bitcoin address is that one wallet can have multiple receiving addresses.
Bitcoin addresses either begin with 1 or 3 and look something like this: 1snowqQP5VmZgU47i5AWwz9fsgHQg94Fa. This format is called the legacy format.
To make transactions cheaper and faster bitcoin is improved. That's why a new address format was launched. The new address format starts with bc1 and it's longer.
The addresses are compatible with each other.