A more thorough explanation:

Definition: An emissary is someone who is sent on a special mission as another's agent or representative. This can be to promote a cause or to gain information.

Example 1: The president sent an emissary to negotiate a peace treaty with the neighboring country.

Example 2: The company's CEO sent an emissary to meet with potential investors and promote their new product.

These examples illustrate how an emissary is someone who is sent by a higher authority to represent them and achieve a specific goal. In the first example, the emissary is sent to negotiate a peace treaty, while in the second example, the emissary is sent to promote a new product. Both examples show how an emissary is used to achieve a specific objective on behalf of someone else.