Blogger.com is a blog hosting service that allows users to publish web logs or blogs on the internet and share them publicly. It was launched in 1999 and acquired by Google in 2003. Over the years, Google made many changes to Blogger, including moving servers to Google, adding templates, comments, photo posting, and language translations. By 2007, Google had full control over Blogger after moving all servers internally, though some changes like briefly banning sexually explicit content in 2015 caused user backlash.