The visual identity of your business is a graphic that most or often symbolizes your industry.
Usually accompanied by a signature (typography) that comes down to the name of the company in a cast of characters that has been carefully selected. This set form the visual identity of your business. Subsequently, we can also develop a lot of adaptations of this logo in a document (standards book).
What is it used for?
It’s the face of your business and it goes much further in the case of a brand. Your logo is supposed to convey the mentality of your company and its values … So a logo is used to identify you and to better recognize you.