What is a trademark?

A trademark is a sign which distinguishes your products and services from those of another. Virtually every company, big or small, uses one or more of the following types of trademarks: a wordmark (Apple)[1], a figurative mark (the Apple “apple”), a shape mark (the Coca Cola bottle), a slogan (have a break, have a kitkat), a colour (Cadbury purple).

[1]Of course, a company name can be registered as a (word)mark.