Roblox Results Presentation Deck

Note Regarding Operating Metrics (cont'd) ROBLOX Q1 2021 Hours engaged We define hours engaged as the time spent by our users on the platform, which includes time spent in experiences, which refer to the titles that have been created by developers, and within platform features such as chat and avatar personalization. Users can personalize the size and body shape of their avatars as well as equip their avatars with items acquired from the Avatar Marketplace, a marketplace that allows users to acquire items such as clothing, gear, simulated gestures, or emotes, and other accessories. We calculate total hours engaged the aggregate of user session lengths in a given period. We determine this length of time using internal company systems that track user activity on our platform, and aggregate discrete activities into a user session. 30

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