Over the years, many have tried to bring us web annotations. On 23 February 2017, things took a giant leap forward when the W3C, the standards body for the web, standardized annotation.

Yesterday, on February 23, things took a giant leap forward when the W3C, the standards body for the Web, standardized annotation.

Twenty four years after Marc Andreessen first built collaborative annotation into Mosaic and tested it on a few “guinea pigs” before turning it off, annotations have finally become first-class citizens of the web.