Game concept · Advanced Activities
Tour Stop
The game also links it as Stops, Stop, Tour Stops.
From the game's encyclopedia
An Activity Phase during a Royal Tour in which a liege can either: attend a Hosted Dinner, Tour the Grounds of their Vassal, or enjoy a Cultural Festival.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Tour Stop is an entry of Crusader Kings III's in-game encyclopedia (Advanced Activities). The game explains it: "An Activity Phase during a Royal Tour in which a liege can either: attend a Hosted Dinner, Tour the Grounds of their Vassal, or enjoy a Cultural Festival." It is part of Tour. The game also links it as Stops, Stop and Tour Stops. Patch 1.20.1.2, from game/common/game_concepts/04_ep2_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/04_ep2_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.