What is website annotation?

Website annotation is the act of adding marks — comments, numbered pins, arrows, shapes, or freehand drawings — to a live view of a website. Each annotation is attached to a specific location on the page, making it clear exactly which element the feedback refers to.

How website annotation differs from general markup

While “markup” can refer to any form of visual feedback on a website, “annotation” specifically means attaching comments or marks to precise locations. A numbered pin at coordinates (450, 320) on a live page is an annotation. A red circle drawn roughly around a section is more loosely considered markup.

Modern annotation tools like Simpl_Markup use click-to-comment — you click on the exact spot that needs attention, and a numbered pin is placed at that location with your comment attached.

Benefits of precise annotation

No ambiguity — the comment is attached to exact coordinates, not “somewhere near the header”
Numbered pins — multiple annotations are clearly labeled and match a sidebar list for easy reference
Cropped context — many tools crop the area around the annotation to show exactly what’s being discussed
Threaded discussion — each annotation can have its own reply thread, keeping conversations focused
Resolution tracking — annotations can be marked as resolved, making it easy to see what’s still outstanding