Company Context

Meta operates several large-scale consumer apps, including Facebook, Instagram, and Messenger, each serving billions of users globally across iOS and Android. In mature products like Facebook, seemingly small navigation decisions can materially affect discovery, engagement, and usability because they shape how often users access core actions.

Problem

A design review team at Meta is reconsidering the placement of the Facebook mobile Search bar. Today, Search is placed at the top of the app. Some designers argue that, because modern phones are larger and bottom navigation is easier to reach one-handed, Search should move closer to the thumb zone. Others believe keeping Search at the top better matches user expectations, preserves hierarchy, and supports Facebook's broad set of search intents: people, groups, Marketplace items, events, and content discovery.

You are the product manager partnering with a UX/UI designer on this decision. Your goal is not just to defend the current design, but to explain why a top placement may have been chosen, for whom it works best, what trade-offs it creates, and whether Meta should keep it there.

Deliverables

1. Identify the primary user needs that Search serves in the Facebook app and the most important user segments to consider.
2. Explain the strongest reasons designers may have chosen a top-placed Search bar instead of a bottom-placed one.
3. Evaluate the key trade-offs across usability, navigation consistency, visual hierarchy, and product goals.
4. Recommend whether Meta should keep Search at the top, move it, or test alternatives for specific surfaces or segments.
5. Define how you would measure whether the placement is successful.

Constraints

• Assume the team can only make lightweight navigation changes in the next quarter; a full app-wide redesign is out of scope.
• Any solution must work across global markets, including users on low-end Android devices and large-screen phones.
• Search supports multiple intents, so the design cannot optimize only for one use case such as people search.
• The team wants to avoid changes that significantly disrupt existing user habits unless there is clear user value.