Optimizing Mailchimp Integration for Gatsby: Tailored Newsletter Subscriptions and Updates

I'm looking to integrate Mailchimp with my Gatsby and Starpi application. Before proceeding, I want to understand how to utilize Mailchimp effectively for this purpose. Let's say I have three pages on my Gatsby site: "News and Updates", "Publications", and "Articles". Each page has its own signup functionality. For example, when a user enters their email and signs up on the "News and Updates" page, they should be subscribed to that specific newsletter. Additionally, I want subscribed users to receive emails whenever there are changes or new articles relevant to the page they subscribed to. In essence, does I need to create three different audiences on Mailchimp for each page ?. Could someone help me understand how can I use the mailchimp here ?