For the third time (after 2012 and 2018), the ACM Web Conference (formerly WWW) is organized by a team from Lyon, where LIRIS' TWEAK research group is again largely involved: Frédérique Laforest is co-general chair of the conference, and Pierre-Antoine Champin and Lionel Médini are member of the local organizing committee.

The conference will be held virtually from Monday 25 April to Friday 29 April. In addition to the 323 papers accepted in the eleven recurring tracks of the conference, 42 papers will be presented in three special tracks: E-sport & Online Gaming, History of the Web, Web for Good. The first two days will host 22 workhops and 20 tutorials. The three foloowing days will be punctuated by three prestigious guests: Prabhakar Raghavan (Google), Virginia Dignum (Umeå Universitet) and Jaime Teevan (Microsoft).