How often or how much time should I wait before considering changing my title, tag words, keywords, text/description, etc.
Which factors should I change first (if any): tags, keywords, text/description, title, etc.
I want change things if they are not working, but not sure how to evaluate this—and ----do I change one thing at a time, all, more than one, etc. Or, just wait it out.
The simple, quick answer is that there is no method. If you think something needs to be changed, upgraded or fine-tuned on any of your gigs, go ahead and make the change. Only you know how you want to present your gigs to the buying community. If something feels off, you can change it at any time.