If you want to keep your game progress, you need to close a video game properly.
1. Save your progress in the game.
2. Click the Exit button in the game.
3. Wait at least 30 seconds up to 1 minute until the cloud is synchronized with Boosteroid.
4. Unless you need to click Exit in the game launcher, close the browser tab.
At this point, the game progress and achievements are sent to cloud servers of a corresponding digital platform (as Origin, Steam), and stored there until you get back to the game next time.