A huge amount of businesses now use social media as a part of their marketing strategy. There is a number of popular social media sites that you can use, but the most popular ones for businesses are usually Facebook and Twitter.
If you have a business that deals direct with the public then social media can often work especially well for you. It will allow you to connect with individual users on a personal basis. If you offer services to other businesses then social media can still help and should be a part of your marketing strategy. Often it is a great way to build up brand awareness. Business to business companies can help establish and build a brand using the social media sites. The beauty of social media, is that much of it is free, it just takes time which some businesses simply do not have. If this is the case then you could outsource your social media to another company to handle for you.