I am planning to build and host a matrimonial website in india. can anyone help me out how to promote it?

That is a lovely idea. You can build a great site if you put your mind to it and your time, of course. I just started building websites and I am having a wonderful time. I use SBI which is a first class company that provides all the tools needed to build, host, promote, and make money with step-by-step instructions and everything you need. I started with them 6 months ago and my site is already over 200 pages and starting to earn an income. You can look at it at http://www.chocolate-candy-mall.com You'll see that I earn money from Google Adsense and affiliate links to chocolate candy sellers around the world. There are many other ways to make money, too, I just haven't gotten that far yet. SBI will show you how to make contact with appropriate businesses in India that you can team up with to make money for bringing them business, etc. They really do over deliver when it comes to helping you get a good website up and running successfully. As you can see, I am clearly smitten with this company. :) Anyway, if you'd like to have a free tour of SBI and see all that they have to offer, you can click on the link for Site Build It at the bottom of any of my web pages or just click on my avatar and use the link in my profile. I wish you the best of success. If you are determined to put in the effort, there is no reason why a site like your idea couldn't become a real business for you. :)

I suggest you build that site using SiteBuildit, because they'll provide easy to use and easy tech that frees you up to do what you wish with the site. You won't have to know that pnp, sql, html gibberish. They really simplify the complex and you can proove that they have done what they are saying they can do. Try the links below.

Hehehe .... easy dude! Have some fake profiles with sexy pic and fake reviews. Rest will taken care by itself!