Brand identity is the part of marketing that keeps working when nobody is spending. It is what makes a returning visitor recognise you in a crowded search result, a social feed or a shelf. A logo on its own does not do that. A defined system does.
Identity work has a direct search effect that is easy to miss: a consistent name, logo and profile across your website, Google Business Profile and social accounts is one of the signals search engines use to connect those properties to the same organisation. We set that up as part of the SEO work, and carry the identity through into web design and graphic design.