Is there a way in which I can tell Google which of my navigation items I consider most important and that I would like to have displayed underneath my "main search result" in Search? E.g., if B&H wanted to have their login page among the six that I have circled in the image below, could they influence that in some way?
1 Answer
No. You can only demote sitelinks (ask Google not to show them).
Google Webmaster Tools > Search Appearance > Sitelinks
Question already anwered here: How to control what appears on google search results?