Instagram’s new location-based discovery tool has sparked a privacy debate, with users divided over how their data is being shared.

The service rolled out this week, prompting confusion and safety concerns. Meta, which owns Instagram, said the feature was turned off unless users activated it.

Tenn., and Sen. Richard Blumenthal, D-Conn., have sent a letter to Meta CEO Mark Zuckerberg, asking that Instagram's new map feature be taken down due to privacy concerns. NBC News' technology contributor Joanna Stern explains how the feature works and why the senators say Meta is not doing enough to protect children online.