Can I use maps API for free?

Hello there, I'm curious about something regarding the maps API. I understand it's a powerful tool for embedding maps and location-based data into websites and applications. However, my question is, can I use the maps API for free, or do I need to purchase a license or subscription? I'm currently working on a project that could really benefit from this functionality, but I'm on a tight budget. Could you please clarify this for me? Thank you in advance for your help.