What does it mean when an e-resource is covered by Bridge²?

It means that the content in this resource is included when you do a Bridge² search. At the least, the resource's title and basic citation data is covered. At best, the full-text may be searched (if the publisher has provided access to that text).

In some cases, subject terms, geographical tags, and other specialized information about the resource might also be searched, but we recommend if you want to do an in-depth search of this kind you access the e-resource directly; that interface will provide you with better controls and options than Bridge².