I rather post from related press release submission websites. Also consider if that websites have many visitors and rank good in SE. Check also if that site is popular or not. Dont waste your time in many crappy sites that dont do anything for your site. Use also top social bookmarks after you posted it.
I don't know, if you're doing PR's, it's always better to go with the high quality submission sites. I would recommend PRweb, eWorldWire, and eZineArticles because I have had the most success with them.
what are the benefits of doing the press release submission??do I get backlinks from doing this?
A properly optimized press release will include your top keywords as well as links to your website. Therefore you'll benefit on it. Once the optimized press release is distributed, it gets picked up on various sites and channels including news search engines such as Google news and Yahoo! news. Every time another website picks up the press release, it reproduces the release along with all of your keywords and
links. This has the effect of generating widespread backlinks (links back to your site).
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