I want to know about introduction of my company via net

What exactly are you asking for?

Are you asking for formats for an introduction letter? You can Google "Introduction letter for business" or "Letter to introduce company" and you'll get many sites. Just look them over, choose which format of letter works for you, and write it.

Hi, Vishakhaji!

Are you looking to advertise on the Internet what your company does or has to sell, please?

Thanks!