How to get Google Maps API?

Hello there, I'm curious about how one might go about obtaining the Google Maps API. As a tech enthusiast and someone who frequently works with web development, I understand the importance of integrating mapping functionalities into my projects. Could you please guide me through the steps involved in acquiring the Google Maps API? Perhaps you could also highlight any prerequisites or considerations that I should keep in mind while applying for the API. Additionally, if there are any limitations or costs associated with using the API, it would be great if you could elaborate on those as well. Thank you in advance for your assistance!