Facebook yesterday officially announced that over the “next few weeks” it will roll out Timeline to all users. This means Timeline, the reverse-chronological display of a user’s history on Facebook and other life events, which replaces and combines a user’s Facebook Wall and Profile, will become non-optional. No specific date was given, and the language used (“roll out”) suggests that the change won’t occur on one single date for all users, but that batches of users will be transitioned on different dates.

Before Timeline strikes your Facebook account, there are a number of key things to know about the feature.

Basically, until recently, users were able to opt-in to Timeline; now they will be automatically switched over. When you get Timeline, however, you’ll have a seven-day preview period, during which you can delete the content that is on your profile and hide what you don’t want displayed.”

Source : http://www.techgig.com/tech-news/editors-pick/12-Things-You-Should-Know-About-Facebook-Timeline-9832