What it means
Adding information to raw data so a model can learn from it: tags on text, boxes on images, timestamps on audio. Postings mostly use it to mean the same as labelling.
Used in: Data annotation roles, many of which need no experience.
In open roles right now
1,933 of the open roles we list mention “annotation” in the title or description, on 54 platforms (as of 23 October 2026). Of those that state an hourly rate (352 distinct postings), the median is $35/hr, and the middle half pay $20 to $60.
Most of them on: Alignerr (242), SuperAnnotate (213), Welo Data (171), Invisible (151), Turing (106), Rise Data Labs (98), and 48 more.
Related terms
Bounding boxA rectangle drawn around an object in an image or video frame, with a label such as “car” or “pedestrian”.LabellingPutting a category or tag on a piece of data: an image, a sentence, a search result, a clip of audio.LiDARA sensor that measures distance with laser pulses and produces a 3D “point cloud”.SegmentationMarking the exact outline of objects in an image, pixel by pixel, rather than drawing a box round them. ← AI interviewPrevious term, A to Z. Assessment →Next term, A to Z. The whole glossaryEvery term on one page, A to Z.Open →