Yes! You're not forced to set royalties however, if you select to receive royalties, you'll earn off of every resale of your created NFT. As a creator, you can choose your royalties when you mint your NFT. After that, you'll attain a percentage (your chosen amount) of the sale price in your wallet every time your NFT is sold to a new buyer.
How to Set Royalties on an NFT:
1. On Rarible's home page, choose to create an NFT.
2. Choose your blockchain and the type of NFT you'd like to create.
3. Scroll down to the "Royalties" field and enter the amount of royalties you wish to receive. Enter the number only, don't add "%".
Note: The maximum royalty percentage you can attain for each sale is 50%.
Note: Read these articles if you'd like to learn about royalties How to set royalties on your collection, How to set royalties externally and What are royalties and service fees on Rarible?