Changing Default Birthday Age (Android)

Raw text

Transcribed text as recorded, including headers and formatting fragments.

Case 4:22-md-03047-YGR Document 3029-29 Filed 05/08/26 Page 1 of 4 Exhibit 156 Case 4:22-md-03047-YGR Document 3029-29 Filed 05/08/26 Page 2 of 4 Changing Default Birthday Age (Android) Motivation: There is an issue that some people use the default birthday that appears in the birthday selector when creating an FB account. This pollutes our data and makes it very difficult for us to target users by their stated age accurately, since it is likely to be incorrect. There are models being worked on to correctly identify a user's age (Lifestage / Age Affinity) despite using the default birthday, but much of the identification relies on user activity and friendship data. For new users with little to no activity, we are unable to assign an age so we only have the user's stated age to work with in our experiments. Currently, on FB4A, the default birthday puts the user at 18, so it is difficult for us to target our testing GKs for teens, as many users end up being labeled as a teen, when in reality we have no idea what their age actually is. The goal is to improve accuracy in all our tests by ensuring we only include teens who have explicitly stated their age. Experiment Info: What's Your Birthday? Your birthday can be bidden from your friends Learn Mors. 27 Mar 28 1999 Before Apr 2000 HIGHLY CONFIDENTIAL (COMPETITOR) META3047MDL-065-00226334 Case 4:22-md-03047-YGR Document 3029-29 Filed 05/08/26 Birthday What's Your Birthday? Your birthday can be hidden from your friends. Learn More. Mar 28 1992 Apr 9661 After Page 3 of 4 with pre-fill age currently. Pre-fill birthday available on all platforms now. Results: Impact on all metrics neutral (good!): https://fburl.com/rj0v7qqj New Account State Core Reg Instance: https://fburl.com/oalq39lk Registration Reg Instance: https://fburl.com/9sSczgsz Registration errors - https://fburl.com/liwh2nkd WAP@14 % using Prefill Birthday We adjusted the default birthday age in the registration flow for new users on FB4A from 18 to 25. This is currently rolled out to 10% of all new users in fb4a from ¥120+ GK: fb4a_reg default age 25 Impact on Age Affinity: The impact on the Age Affinity model is estimated to be trivial. Test models have been run in the past, sampling out defaulted birthday users and showed no noticeable difference. Related Note: Currently, only iOS and Android have a default birthday, while www.and mtouch/msite surfaces are experimenting Group Total WAP@14 Default Birthday Not Default E 1 control 61165 5048 56117 0.08253 2 61669 5467 56202 0.08865 test Test: 8.8% Control: 8.2% https://fburl.com/xemi2605 Before: 39.7% of new registration are labeled teen After: 23.5% of new registration are labeled teen Query: https://fburl.com/y2or94bz Group Regs Teen Regs % Teen Reg 1 test 15948 3750 23.51% HIGHLY CONFIDENTIAL (COMPETITOR) 3 ΜΕΤΑ3047MDL-065-00226335 Case 4:22-md-03047-YGR Document 3029-29 Filed 05/08/26 2 15776 6262 39.69% control 3 https://fburl.com/7fimde7mc Account Created Age buckets from 5/01 - 6/25 Page 4 of 4 A B C D E G H 1 total 13-17 18 18-20 20-25 25 25-35 35-65 2 control 825,625 129,138 146,401 63,965 102,373 19,754 156,647 158,056 3 827,525 114,064 50,242 55,675 100,139 125,171 172,462 160,084 test 4 15.64% 17.73% 7.75% 12.40% 2.39% 18.97% 19.14% 5 13.78% 6.07% 6.73% 12.10% 15.13% 20.84% 19.34% 6 -1.86% -11.66% 7 627.77% Prefill Rate (created accounts) https://fburl.com/uhinaofn % Using Default Age from 5/01 - 6/25 A total reg default 18 default 25 % Default F G H 1 1 control 873240 69943 1935 8.01% 2 875463 7595 70981 8.11% test 3 4 Next Steps: Getting sign-off for potential issues like Policy, then launching to 100%. Pushing to get the same change for all platforms. Contact Support Conversation History Quipbot#10 left the thread Aug 22 at 12:30 pm Quipbot#10 Aug 22 at 12:25 pm IMPORTANT This Quip file has been copied to Google Workspace (https://docs.google.com/document...) as part of the Quip2Google migration efforts. Quip is moving to Read-Only. Please work in the new Google file moving forward. Learn more https://fb.workplace.com/groups... Questions? Visit the Quip2Google Migration Feedback Group (https://fb.workplace.com/groups...). Note New edits in this Quip file will NOT be automatically synced to Google Workspace. HIGHLY CONFIDENTIAL (COMPETITOR) ΜΕΤΑ3047MDL-065-00226336