The simplest way to collect feedback about your website from your users.
If you want to collect feedback from your users you'd typically provide some kind of form that would require the user to describe, in detail, what was expected and what went wrong. This is pretty standard and is used across the industry. Sometimes it may not be so easy to describe it in words so affordances like image/video upload are made.
Videos are probably the most useful as you can see, and maybe hear, what the problem is. The downside of videos are their size and the fact that you need to watch them in their entirety to fully understand what is the problem. Screenshots have their own problems. Users often need to highlight part(s) of the picture to make clear what they're talking about. Most users wouldn't bother with that. And last but not least, language. The user simply may not know how to articulate the problem clearly.
The problem is two-fold:
Websites are simply a tree of DOM nodes. We can click them. I propose if we allow the user to simply click at what's frustrating them in the page then half the confusion is resolved. Let's try it out. Click on "Toggle feedback mode".
The following paragraph has a spelling mistake. It irks you. You must let the website owner know that there is a spelling mistake on the website. You might have noticed that the cursor changed into a crosshair after toggling "feedback mode". Click the paragraph below.
This line has an intentional seplling mistake.
If you're reading this I trust you have gone through the exercise of toggling feedback mode and clicking on the paragraph above. Let's review what just happened. You clicked a checkbox to toggle the "feedback mode", you hovered over the paragraph with the spelling mistake, you clicked it, it opened up a dialog/modal which asked you for feedback on what you clicked and showed you a preview