“Using the social media platform of twitter you can post, several tweets along with status updates and much more. Who says the social media network of isn't made for you... ?”
You need at least one dedicated team member to work on it or it won't be any good. Besides that, the team member has to interact with people on twitter. This alone, if there are budget constraints, can make twitter useless. Unless all you are going to do is blast links to your followers, which only takes a few seconds, or a button push most times.
“I like Twitter because this is plat foam that provide you unlimited friend request in one day. If you Talk about other social network sites like Facebook only permission 20 request in 24 hrs. I hope if you use twitter that good for you business first of all add your product in twitter profile.”
Not always. Yes, its important to establish yourself as a brand on twitter and how many other social networks out there, but you still have to be practical about it. You're marketing a product or a service yea, but people aren't always going to like hearing @myproduct or @myservice yammerng away about their products or services. Best advice would be to start a twitter page as a company, and then have someone work on it using their own name or "alias" to actually talk to people and not just toss out tweet after tweet of links. It puts people off of twitter followers and TBH they will unfollow you in the end.

Everyone here knows how talkative I can me at the worst of times, so what I did was try an experiment. I have been busy with document analysis for a few months, so our company twitter page was dormant for a while, unless I tweeted something I had read, which in the end, turned out to be a link every now and then. Last week I got back to marketing and logged into my twitter page.
Talk about links central. :P So I decided to try something. I waited, leaving my twitter page open while doing other work, but checking up in tweets every now and again. In my twitter feed, someone declared a "woot off". no links, just that sentence and asking who's in. All I did was type @... I'm in. That user ended up following me, and not just that, but people that saw the interaction, from his list and some of my other follower's lists actually followed me as well. Proof that interaction works better than just posting links all the time.
I am in the process of working out how to get interaction going on my twitter page, in relation to links, so I am going to be unfollowing a good many people, and only keep following those that actually talk to me and not just bombard me with links.