¿Cómo se pueden vender los bitcoins?

I'm curious to know, how exactly can one go about selling their bitcoins? Is there a specific process or platform that's commonly used for this purpose? Are there any fees associated with selling bitcoins, and if so, how are they calculated? Additionally, what are some of the key factors to consider when deciding the right time to sell your bitcoins? I'm looking for a comprehensive guide on the process of selling bitcoins, so I can make an informed decision about my investments.