Doest changing title tag and meta tag of homepage affects ranking ?

yes, It affects on ranking.

Thanks all :)
I will check the same with my website ExpertAssignmentHelp[dot]com and see th results :)

Glad to find that everyone is saying YES. I will do changing in my site.

absolutely it effect the ranking.

yes meta tag is very important for a website in go to good rank..

yes changing meta tag improve the rank

yes, change in meta tag affects ranking

Absolutely changing in Meta affects the ranking of your keywords in search engine.

Yes, it will sure affect the site ranking !!!

The answer is yes!. That title should always include the keywords and phrases that people will enter into the search engine to find you.

Yes, Meta tags are created to provide info to search engines. They are very imp in terms of ranking.