Your brand identity is the visual representation of your overall brand. It’s how your brand communicates visually.
And sure, your logo design is part of your brand identity, but there’s more to it than that. It’s the language you use, the typographic choices you make, the style of photography in your brand communication, and more.
When you work with a design agency to help design and develop your brand, they should wrap up your brand identity in a document, often called Brand Identity Guidelines.
This can then be used when working with others to help communicate your brand visually.