Implementation of flow that stuck out to me after the reading is in the music app Spotify. The implementation I am talking about is when a member of the streaming service doesn’t have a paid membership and listens to music with advertisements in them. I believe the placements of the advertisements are very important in the flow because if there are too many of them in a short period of time the user will get tired of them and leave the app but if there aren’t enough then Spotify will not make enough money off of the sponsors who place their ads within the app. This balance is very important to the flow because if it is perfectly balanced Spotify will be able to maintain user retention and maintain enough money from advertisements to keep the app running. Another thing that Spotify does that helps with flow and user retention is allows users to get periodic advertisement breaks for 30 minutes which provides users with “a break from the ads” as Spotify says, and incentivizes them to keep using the app for the rest of the 30 minutes.