The .biz top level domain is a new generic domain which is intended for use by businesses. Similiar to .com, there are very few restrictions on what names can be registered and who can register them; the only stipulation is that it should be used for business rather than personal purposes.

Having a www.company.biz website is becoming an increasingly common location for business orientated websites.

Registering in .biz can help protect your company name and/or trademarks from being used by others, even if you don't yet want to set up a website.

Registering a .biz domain is useful in giving the impression that a company is a "global entity" and does not initially give away a location.

There are much fewer .biz domains registered compared to .com or .net, this means that your chosen name is more likely to be available.

Although growing in popularity, .biz is a lesser known top-level domain so there may be a slight initial resistance to its widespread acceptance.

Having a www.company.biz website may obscure the fact that you are located in Ireland, and may be a turn-off for people who habitually "Buy Irish".