Actually based on the latest google penguin 2.1 update we got a keyword ranking dip for all the keywords & links were not in the top. Before it was in the top rankings for the most of the keywords.
We have found the below 3 reasons:
1. we are having internal links for the inner pages within the content of the site.
* keywords are same but internal links are different.
2. We are having site wide links in the left side for all the key pages with the targeting keywords.
3. Mistakenly we have changed the meta tags for the pages recently. But we have updated the old meta tags again.
We need a solution and Internal link optimization checklist to get back the keyword ranking for those pages.
Also i have a doubt shall we change the keyword phrases and target the same links which are in the left site wide pages?
Thanks in advance.