Is there a way to stay in Spain for longer than 90 days?

I'm curious, is there a way to extend my stay in Spain beyond the initial 90-day visa limit? I've heard rumors about visas for longer stays, but I'm not quite sure how to navigate the process. Could you please clarify the options available for someone who wishes to remain in Spain for a longer period of time? I'm particularly interested in any requirements or conditions that may apply, as well as the general steps involved in applying for a longer-term visa. Thank you for your assistance in clarifying this matter.