I'm using Sharepoint Designer to craft a workflow that will do the following: When someone in a specific group enters a value in a field (i.e. the field is no longer empty) in one library, this workflow will run and do some validation and then change a value in another list. (The specifics aren't important, I don't think.)
I'm very confused as to whether the "Conditions" steps are triggers or rather things to look for when the workflow is eventually run. And I'm also not sure how the "If value equals value" construct can be massaged to do this.