It's all in the name. With daily freespins you will receive a new batch of free spins every day. Daily spins are mostly given after making a deposit, or when you are a VIP player.
The magic about daily free spins is you wont have to keep making deposits if you want to keep playing. Make a 1 time deposit and you can play the following days with new free spins. An example would be as follows:
You make a deposit of €20 and you receive 200 free spins on Starburst. The first 20 free spins are given straight away. The following 9 days you can login again and get 20 more daily spins, each day.