What should a site owner do if they think they might be affected by Panda?

normal indexing process. Now, how will webmaster come
to know whether her site is hit by Panda? And, if her site
is already hit, how she will know that she has recovered
from Panda?
Nandita B, India

Some ideas on how to evaluate the quality of a site:
https://googlewebmastercentral.blogspot.com/2011/05/more-guidance-on-building-high-quality.html

Have a question? Ask it in our Webmaster Help Forum: https://groups.google.com/a/googleproductforums.com/forum/#!forum/webmasters

Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions: https://twitter.com/googlewmc

More videos: https://www.youtube.com/GoogleWebmasterHelp
Webmaster Central Blog: https://googlewebmastercentral.blogspot.com/
Webmaster Central: https://www.google.com/webmasters/