What do you wish people knew about having a service dog?

I am currently looking to do a case study to help bring awareness about service dogs in order to help people run into fewer problems throughout their day. I have some questions about your experience if you have/had a service dog:

What do you wish people knew about having a service dog that would make your day go smoother? This can be specific to you and not necessarily a shared experience.

Is there anything you wish people knew but is also simultaneously too intrusive to share publicly?

Does your service dog wear a vest with any information on it? What information would you like to be able to share in this way if you could?

Has anyone taken the initiative in the past to do something helpful for you without you having to ask? (aside of course from generally being respective and leaving your dog alone)