As well as a comparatively cheap advertising medium, An online presence can prove to be an invaluable marketing tool; providing up to date information and news concerning your business.
If you wish, you can also give customers the opportunity to interact with your site, which can give you instant feedback or data for market analysis, direct from your customers or peers.
All sites will comply to xhtml / css standards as set by the w3c, and aim to be accessible to all users, regardless of physical imapairments, or age of computer.