A blog is best defined as: a web site primarily involved in tracking people's behavior on the Internet. a web site that typicall
y acts as brokers for advertisers and web sites. a smaller version of the banner that often look like an icon and usually provide a link to an advertiser's landing page. a little billboard that spreads across the top or bottom of the web page. a reverse chronological journaling site.
A blog originally known as weblog, is an online journal containing informational or educational content, it usually displays information from the last added item ( that is why it is called reverse chronological journaling site), it can be personal or for a corporate entity for promoting brand identity.