Hello Guy's plz tell me what is guest blogging and how does it work for our website. plz tell step by step process to make a account in any guest blogging sites...
Guest Posting is great source to promote your website services with the help of high PR blogs of same niche. All you need to do is contact blog owner and ask to publish your content on his blog and get relevant back links from the blog.
Harry has given you some good info. I just wanted to add that when you reach out to other bloggers or web masters, make sure they operate sites that are either related or complementary to your niche. These are the best kind of backlinks to get. Also make sure that you can get a link in the body of copy with anchor text of your choosing for the post.
Here is a good article on guest blogging,
Guest blogging is a method used by bloggers to increase blog traffic where bloggers write posts to be published on other bloggers' blogs. Guest blogging can work in one of two ways:
1) You write a post to appear on another person's blog.
2) Another person writes a post to appear on your blog.