A letter of recommendation is a document where the author states about his or her experience and expertise about a particular person, company, organization or an organization. It is an important document that is usually written in support of a recommendation for a specific individual or organization. A well written letter of recommendation can be one of the most useful and powerful tools in one's professional career. A letter of recommendation is actually a request made by an individual to another individual who may have an important and necessary role in his or her career.

There are different types of recommendations that people write to enhance their careers, such as reference letters, which are usually written by those who have worked with an individual in his or her profession. A recommendation letter is also referred to as an executive summary or an overview. Professional references or client letters refer to those who provide information about an individual's professional achievements, which are usually achieved after a period of specialization within a certain field or business. In some cases, letters of recommendations may be written to add information about a certain candidate to a search or resume.

In order to write a recommendation letter, it is necessary for the individuals to carefully research the reference letter they will be sending to the possible employer. Since these letters are usually sent along with a resume, the content must be relevant and accurate. The sender of the letter should take time to ensure that the contents of the letter are not only impressive but also coherent and organized, in order to create a good first impression.