A logo has multiple functions to do in an organization, a few of which are quoted as below

Recognition

One major function of a logo is that it is the identity of your business, over time, when the brand gains popularity, the customers start associating a particular design of a logo with the brand.

Influence

The brand value associated with a particular logo of a company stirs the thought process of the consumer and greatly influences the decisions and choices of the consumer when making the purchase.

Evokes emotional response

A mere look at a particular logo revives the past experiences and good or bad memories that a consumer has had with a particular brand. This builds up consumer loyalty and makes your consumers understand the value system of the company and sensitivity towards qualitative aspects.

Additional Message

A logo, apart from making things differential, also aids the brand to deliver an additional message that carries a meaning which indeed makes the objectives of the company clearer for the normal consumer.

Reflects your business

The brand name and logo are two major factors that tell the consumer mostly everything about your business; your sector of dealings and the range of products/services that you work with.