The first time you Pass in a Round, flip your Summary Tile with the Reactions Overview faceup to remind other players you have Passed.
The first player to Pass receives 2 Money and the Start Player Tile for the next Round. On subsequent Actions, players who have Passed may take one Reaction or Pass. Reactions are weaker versions of the Upgrade, Build, and Move Actions (see the Reactions section in the Action Phase section for details on Reactions).