Logos are important to a business as it is a way for customers to recognise your business and something visual for them to associate your name with. It is an essential aspect of your brand identity and all good businesses take their logo design very seriously as they know it's important with some major companies spending millions on simple redesigns of their logo.
Logos are still very important for smaller companies they aren't just for major businesses. Logos can be used to put on the side of your van or business cards or your website and will help people recognise and remember your company.
It's not just having a logo that's important it is also important to have a well designed logo. Having a logo that looks poor will reflect poorly on your company and means people will associate a poor logo with your business.
Must be media does offer a logo making service which you can read more about here http://www.mustbemedia.co.uk/services/14-logo-design which has a list of prices. It is not very expensive but the logos are of a high quality.