When Facebook  began testing its new “Neighborhoods” feature in Canada last October amid the COVID-19 pandemic, the tech giant described it as a dedicated place for people to connect with their local communities.

Here, in a corner of the world’s largest social network, people met neighbors, shared banana bread ingredients, helped locate missing cats and swapped local business recommendations, the feature’s product manager Reid Patton said in a recent interview, according to a Reuters dispatch from New York, Vancouver, Toronto and California.

But Facebook, which is rolling out the feature in four U.S. cities — Baton Rouge, Louisiana; Charlotte, North Carolina; Newark, New Jersey; and San Diego, California — is already playing catch-up in the red-hot market for local social apps.

Community site Nextdoor has emerged as a key player along with Amazon Ring’s Neighbors and crime-tracking app Citizen.

Nextdoor, which saw usage surge during lockdowns, reported 50 percent annual growth in daily active users last year.

Facebook has in recent years focused on on-site communities that matter to its users as a tactic to drive engagement. The company, which made the vast majority of its almost $84.2 billion ad revenue last year from smaller businesses, many of whom court local users, also said users’ activity and information in Neighborhoods may be used to personalize their experience and ads across Facebook.

Neighborhoods users are prompted to introduce themselves, log interests and answer ice-breaker questions, like favorite DIY projects. People can take roles like “socializer” or “helper” and their profile information populates a directory that even identifies local pets by name, Patton said.

But Facebook, long under fire for its moderation and design decisions, will likely contend with challenges that have bedeviled rival hyperlocal platforms, such as misinformation, racial profiling and privacy concerns, say civil rights groups and social media researchers.

Facebook is already under scrutiny from lawmakers over its Groups feature, which it says is used by more than 1.8 billion people every month, including to connect with their local communities.

Researchers identified Facebook Groups as a source of false claims and violent incitement ahead of the U.S. Capitol riot.

“Online rhetoric can lead into offline antagonism and violence really quickly,” said Nina Jankowicz, a global fellow at the Wilson Center who has researched how Facebook Groups have been used to push conspiracies. “Facebook’s moderation of Groups leaves a lot to be desired.”

Facebook’s Patton said the team designing Neighborhoods took into account problems in Groups: “We’ve tried to learn from across Facebook products and beyond, and build an experience that does make people feel safe.”

A Neighborhood largely relies on multiple unpaid community moderators, offered the role by Facebook after it assesses how active they are in other communities and screens rule-breakers. It is also developing moderator training on sensitive issues. All Neighborhoods users must be over 18 and new accounts or repeat rule-violators are not allowed.

“I would not be surprised if (Facebook) cared a little bit less about the kindness you show to the people you suspect are stealing your packages,” said Matthew Guariglia, a surveillance analyst at the Electronic Frontier Foundation.

Facebook’s biggest challenge in the hyperlocal market is overcoming the head start of its competitors. Nextdoor said it covers a third of U.S. households, operates in 276,000 neighborhoods globally and is planning expansion in more countries.

Facebook’s arrival “doesn’t really mean anything. It means eyes on the prize,” Nextdoor CEO Sarah Friar said in an interview. “From a broader perspective it certainly, I think, proves our point that local has never mattered more.”