What is the tick spacing fee for Uniswap v3?

Excuse me, could you please clarify what exactly is meant by the "tick spacing fee" for Uniswap v3? I'm familiar with the concept of trading fees on decentralized exchanges, but I'm not sure how the tick spacing specifically relates to fees on Uniswap's third version. Is it a fee that is charged based on the distance between the price ticks or is it something else entirely? I'd appreciate any clarification you could provide on this matter.