Answer:
It is important to send a business letter as a way to introduce itself as a company and in order to communicate that the company is interested in starting a relationship with the other one so therefore they can improve their situation in the market.
Explanation:
To begin with, a "Business Letter" is the type of letter that is sent from one company to another one in order to make the first step to establish a future relationship between those companies. It also can be sent from one company to its clients, suppliers, etc. Moreover, this type of communication implicates a formal and permanent record that it can be saved by any party in order to use it later as a prove of the facts established in the letter. Furthermore, every letter has its unique type of content that it will be determined by the type of relationship that the parties have with each other.
