Brand guidelines are a set of rules and standards that outline how a company's brand should be represented visually and in written communications. They can include elements such as logo usage, color palette, typography, imagery, and tone of voice. Brand guidelines are important because they help to ensure consistency across all communications and materials, both internal and external. This consistency helps to establish a strong and cohesive brand identity, which can enhance the company's reputation and increase recognition among customers and other stakeholders. Additionally, brand guidelines can help to protect the company's intellectual property and prevent unauthorized or inappropriate use of the brand.
https://assets.ctfassets.net/4cd45et68cgf/viVq3fhHa1cmQTo3g3p6i/e649362c86a78c3744beebc641e6ec19/2020_Netflix_Symbol_Logo_Guidance.pdf
https://about.twitter.com/content/dam/about-twitter/en/brand-toolkit/downloads/twitter-external-brand-guidelines-01272021.pdf