Visualize the blue 'F' of Facebook or the a bitten "apple" of Apple and you'll realize that a trademark brands your business, product or service in a significant way. That's why trademark is important.
A trademark is an identifiable mark, design or even a word which identifies a product or a services of a particular business. As soon as you have applied for the trademark, you can use the TM symbol next to your name. And after the trademark registration is complete can you use the ® symbol.
Trademark gives your brand great protection and value in the market.