A blog is a website where an individual, group or an organisation publishes their thoughts & opinions about a specific topic. Each blog has its own niche, like food, travel, fashion, tech, etc.
Blog posts are displayed in a reverse chronological order. So, the newest entries appear at the top of the page & older entries are towards the bottom .
There are several blogging platforms available online, such as WordPress, Blogger, Wix, Squarespace, etc.