Quick question here–and I kind of have not searched this because I’m not even quite sure how to describe it, but I’m wondering how I can set up a situation where a user receives an email from my app with a link in it, and when they click that link it can set the state of a page or an element on a page. Is this possible with bubble?
Thanks 
Use url paths or parameters in the email link. For eg your link is www.myapp.com/[page-name]/[thing-uniqueID] and you set the actual page of the app to have a ‘thing’, then it will load that.
Or if you set a url parameter like www.myapp.com/[page-name]?v=[somevalue] then on page load you can look for that parameter and run your actions.
The manual has more info on setting page things or URL parameters.
