One’s presence over internet, as an individual or a business, is in part defined by the domains he or she is using to post articles, products and/or services. An appropriate domain name will boost your traffic and your popularity, it may become a trademark if it wasn’t already before you have started the online activity. So you have to consider your domain name as assets you must protect and to improve their values in time.
There are a lot of possible reasons people may loose their online domains, some are very common, some are not so often related with every day practice.
You can lose visitors and customers because of typo domain names
As I’ve written some time ago on a websited related with web design, you should reserve different but similar domain names for your business. The reason is simple: when information is being transmited from one person to another there can always appear errors, people may mispell or type with errors the name of your site. If the domain name have digits or words separated by hyphens reserve a domain name similar: with the same words, but no hyphens and with the digits as letters.
It does not look that you are protecting the domain name in this way, but in order you have one famous domain with a great working website you must cover all the field, not to let anyone take advantage by your work and ideas.