The name, title and intro are displayed as text elements and not as graphic elements. Moreover, the name of the research group is automatically published as the page title. These elements ensure good search engine optimisation.
The logo of a research group, centre, project, etc. can be published on the web page itself, beneath the header. The logo should not be included in the header, as the text can be very long and the logo image often has an unsuitable size. This would interfere with our mobile-first approach and the readability of the page. Moreover, the text in an image is not indexed, when indexing text is in fact crucial for search engine optimisation.
More information.