Its no longer enough to just have a websites, you must have a social media presence, here is an overview:
Microblogging service that enables users to send text-based posts of up to 140 characters.
Pros – Ability to quickly respond to clients and customers.
Cons – Promotion must find a delicate balance between content and spam. Large follower drop off rate.
A large social network where people create profiles, exchange messages, and report status updates.
Pros – Great for brand exposure and customer relations.
Cons – Not SEO friendly.
YouTube
A video-sharing website popular for user-generated content, video clips,and video blogging.
Pros – One of the best venues to build your brand through video blogs and tutorials.
Cons – Traffic is often limited to site and is difficult to redirect back to a primary website
Google+
A social network operated by Google with profiles, status updates, circles,hangouts, and sparks.
Pros – Easy way to interact with clients and customers. Can be integrated with other Google applications.
Cons – Administration is difficult and some small business owners find most clients don’t use Google+.
Tumblr
A microblog and social network that allows that users to post text, images, video and share via reblogging.
Pros – Great platform share content links with a younger demographic of bloggers.
Cons – Images tend to garner traffic, but most of it comes from within Tumblr.
Digg
A social news website that allows users to submit stories and vote them up or down.
Pros – Gives brands the opportunity gain a large amount of exposure.
Cons – Not designed for customer interaction.