web2.0 & short article is hit by Panda update. google call it Shallow content

Google Panda Update 2.2

then i search about it and this i found
Just because an article is long doesn’t mean there’s more value. Just because an article is short doesn’t mean that it’s shallow. Sometimes long articles are long merely for the sake of it. Sometimes short articles are jam packed with great information and resources

any one tell me What exactly Shallow content is ?

yes i post question on two places.
because i want to get a good and useful answer
that can help me with my work
i already read this post that you post
i have some question that i post here and in other forums

Thanks you for sharing this

The part "What is Google Panda Really After" should explain your question, and if not, what don't you understand exactly?