A microblog has many aspects similar to a conventional blog, but is more focussed on the headline and immediacy of the news being posted. A normal blog allows you the freedom to explore a subject matter in detail and expand upon the subject in a way that reads well and carries relevant content to the reader. A microblog is more a headline grabbing exercise.

Twitter and fb are examples.Websites on which you put your thoughts in few words unlike blogging where you write hundreds of lines.

it is actually building a blog in others blogs which is managed by others
you are just like editors.

Microblogging is blogging in short snippets.

Microblogging is a web service that allows the subscriber to broadcast short messages to other subscribers of the service. Microposts can be made public on a Web site and/or distributed to a private group of subscribers.

Micro-blogging is a combination of blogging and instant messaging that allows users to create a short message that is posted on their profile.

The activity or practice of making short, frequent posts to a microblog. Microblogging is a web service that allows the subscriber to broadcast short messages to other subscribers of the services. Microposts can be made public on a web site and/or distributred to a private group of subscribers and they can read microblog posts online or request that updates be delivered in real time to their desktop as an instant message or sent to a mobile device as an SMS tect messge.

practice of making short posts to a microblog

Microblogging is a web service that allows the subscriber to broadcast short messages to other subscribers of the service. Microposts can be made public on a Web site and/or distributed to a private group of subscribers.

Micro blogging is a form of blogging that allows to share something withing 200 characters.

Micro blogging is a type of comment posting which consists of only 140 characters within which you have to express yourself effectively. It is powerful technique to attract huge visitors towards your website rapidly.