How many sols are in a day?

Could you please elaborate on the question, "How many sols are in a day?" I'm curious to understand the context behind this inquiry. Is "sol" a specific unit of time measurement that I'm not familiar with? Or is it related to some scientific or astronomical concept? Additionally, what is the significance of knowing the number of sols in a day? Could you provide some background information or clarify the meaning of "sol" for me? Thank you for your assistance in helping me understand this question better.