Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
Mailchimp is a marketing automation platform and email marketing service.
React is an open-source JavaScript library for building user interfaces or UI components.
Vercel is a cloud platform for static frontends and serverless functions.