Automatic SEO for wordpress [closed]

take a look at WordPress SEO by Yoast it will cover :

1) make the title of the page, the
title of the post

2) make the
description based on the first
paragraph

as for your #3

make the keyword meta by parsing the whole post, retrieve all the relevant word that are more that 3% occurrence, and fill the meta with them

I highly doubt you will find a plugin that does that for you, but there are a few like

• Keyword Density
• SEO-Tool – Keyword Density Checker

which do chack that , so i guess you can use that to update your keywords.