How to find the Suitable keywords for my website?
Assuming your question is about using A1 Keyword Research for this:
First get some keyword suggestions:
http://www.microsystools.com/products/keyword-research/help/keyword-suggestion-research-tools/ (http://www.microsystools.com/products/keyword-research/help/keyword-suggestion-research-tools/)
Currently A1KR does not integrate with Google Adwords keywords tool. You should use that to check traffic:
https://adwords.google.com/select/KeywordToolExternal (https://adwords.google.com/select/KeywordToolExternal)
Then check competition for the keywords:
http://www.microsystools.com/products/keyword-research/help/keyword-research-competition-analysis/ (http://www.microsystools.com/products/keyword-research/help/keyword-research-competition-analysis/)
If your question is more general, ask in the search engine optimization (http://webhelpforums.com/index.php?board=12.0) forum at this website! :)