[Should I care about...] Microblogging

A new services type emerged over the last two, three years in the internet: microblogging. With his most popular representative Twitter Microblogging became very well known and widely used. But what is Microblogging? How does it work? What services are out there and how do they differ? And most importantly: As a an owner of a [BUSINESS_TYPE_HERE] business: Should I care about Microblogging? 


I say yes, if you want to use a service which helps you to provide your community with information and which doesn't take up a lot of time updating it. But...