Blogger is a blogging platform that allows users to create private or multi-user blogs. It was developed by Pyra Labs and later acquired by Google in 2003. Blogs on Blogger are hosted on subdomains of blogspot.com. The document proceeds to outline key features of Blogger like customization options, easy publishing, and notifications, before providing a 7-step process for setting up a new blog that involves signing into a Google account and selecting design templates and URL options.