For many organizations, maintaining a consistent brand identity across SharePoint sites is crucial. The distinction between “Site Logo” and “Site Logo Thumbnail” is essential, as they serve different purposes across SharePoint and the Microsoft 365 ecosystem. The site logo appears in the site header, while the site logo thumbnail is used in search results, site cards, when copying/moving files, and other critical areas. It plays a vital role in helping end users differentiate between various SharePoint Online (SPO) sites and Teams.