Paramita, in other forum I got some informations about how to use twitter, it was posted by one member, I don't know her name, but I have copied that material and hope you would find it useful.

....'Hello there! First what you can do is Log in to your Twitter account and click the tab >>Find People>>Suggested Users.

Try to look around and find some people with similar interest to follow or if you have friends that you want to add on Twitter, provide the details there and Twitter will send email to invite them. The reason for doing this is, you need audience before you can promote your blog. You can't promote if there is no one to see your post.

There are two ways to promote your blog. One way is to do it manually: You type the words of your blog title and give the link and click update on your Twitter account. OR you can set up Tweet This button on your blog (needs some html coding) and Tweet the blog post after each time you posted. This is still manual.

The second way is automatically set up your blog feed so that another site will post your feed to your Twitter account for you. This is how I do it.

Go to this site>>> Twitterfeed.com

You can login/register with OpenID. If you do not know or understand what this is, please post here and I can explain. Once you have registered or logged in, you can create and add your blog feed to the site and choose how often the site will crawl your blog and post new Title/Description of your blog post there. You can add as many blog's feed that you like. You can choose how many post to crawl and the time period given there. This process is to automate your blog posts without you doing anything further.'