Netlify has significantly enhanced the process of hosting and deploying sites by introducing a suite of features, including cross-framework support, analytics, and serverless functions. A standout addition is the build plugins, which automate tasks connected to the build process, allowing developers to perform actions such as sending notifications or making cryptocurrency donations each time a project is deployed. The process of creating a Netlify build plugin involves setting up a "skeletal" structure with files like index.js, manifest.yml, and package.json, alongside a netlify.toml file for integration. Developers can create custom plugins, such as one that sends emails upon deployment, by utilizing dependencies like Postmark for email notifications. The tutorial highlights the importance of understanding Netlify's build events, which determine when a plugin is triggered, and emphasizes best practices like error handling and securing sensitive information. As build plugins become more mainstream, they offer exciting opportunities for cross-collaboration, with many examples available for developers to explore.