What value do you put on bounce rates?

Also session duration is important to consider with bounce rate. As mentioned in previous reply, even 100% bounce rate may not be bad if session duration is high say 45 sec or higher. This shows users are landing on a page reading it getting information and exiting out. As far they are devoting sufficient time, it’s okay. Low session time with high bounce rate is bad. You need to either improve quality of traffic or make more engaging contents.

This will depend on the page, how the visitors are arriving there, and what you want them to do. Are you targetting the right demographics to get them to the page? Where do you want those you target to go after hitting the landing page? Is there content that entices the ones you target to go further? Those values are only good/bad in the context of the desired outcome and are meaningless without that context. Even a 100% bounce rate could be OK for a page. For example, one that a software company has to describe a fix to an error. People search for the error, get to the page, and don't need to go further.

It depends on your content. How specific is it and what kind of overlap wiht other markets do you have. For example, if you are targeting Sage 300 ERP users, you might use Sage 300 as a keyword and get Sage 300 CRE customers which are totally different. They would spend a few seconds and bounce. Nothing can be done about that. I think click through rate and the number and quality of your leads is much more important.