I had a colleague tell me that they have stopped blogging and now spend most of their efforts on Twitter. I was mystified as to why and found out that this person thought that Twitter would help with their organic search placement. “Yikes! Don’t stop blogging!” I said, “Twitter does nothing for SEO and blogging does.”
Twitter is great for social networking and driving traffic to your website, but for now, search engines do not index tweets so you get no SEO juice from Twitter. Blogging is still one of the very best and easiest ways to help improve your web authority and potentially your organic placement. Each one of your blog posts, unlike tweets, is indexed by search engines and builds content in your search authority profile that search engines routinely review with their spider bots.
If your blog is housed on your website server under your domain, you geet the SEO juice from your blog post. If your blog is under a different domain or at www.Blogger.com you get the links and traffic but not the SEO juice and web authority.
So, the bottom-line is even if you do Twitter, don’t stop blogging. Blogging actually works harder for you to bring you long term benefits at this point than do tweets when it comes to SEO.