My question is that ..in how much article submission websites i summit my article for link building.Before few months i submit same article in 4-5 article submission websites but now i read somewhere trend has been changed.
submit one article to only one article site. If you want to submit to another article site, you better rewrite it or spin it
When you submit the same article to numerous article directories or if you have an article on your blog and you submit the same one to a directory it will be seen as duplicate content and it hurts your site rather than helping it.
I would concentrate on a more diverse link building strategy by including alot more avenues than just Article submissions.. That alone is not really going to get you anywhere... Holla!~
You can do unlimited sites, but care about quality of the directory, so there is no SPAM and good pagerank. If you talk about duplicate articles, one on many sites, then you should do max around 2 directories, but never do this in bulk. Submit like one a month, or once per two weeks two articles.. should look organic.
They might get you 'backlinks', but they are pretty worthless ones. All article directories are spam and junk!
I do nothing to create links. My main site recently got links from the Washington Post and Runners World magazine - how many 1000's of article directory submissions do you think would be needed just to match those two links?