If DAU (Daily Active Users) for Messenger has been flat in a particular market, there are a number of potential strategies that a product manager could consider to try to increase engagement and grow the user base. Here are a few possible options: 1. Understand the specific market: Before making any changes to the product, it's important to understand why DAU has been flat in this market. Is there strong competition from other messaging apps? Is there a cultural or social barrier to using Messenger? Conducting user research and analyzing market data can help product managers identify potential issues and develop targeted strategies to address them. 2. Improve the product: Once you understand the specific market, consider ways to improve the product to better meet the needs and preferences of users in that market. This might involve adding new features, improving the user interface, optimizing performance, or addressing bugs and other issues that are causing users to disengage. 3. Target new user segments: If DAU has been flat among existing users, consider targeting new user segments that may be more likely to engage with Messenger. This could involve developing new marketing campaigns, partnering with influencers or other brands, or leveraging existing user data to identify potential new segments to target. 4. Launch new products or features: If Messenger is facing strong competition in a particular market, consider launching new products or features that differentiate Messenger from competitors or offer unique value propositions to users. For example, Messenger could launch new tools for businesses or integrate with other popular apps to offer new functionality to users. Ultimately, the right strategy will depend on the specific market, user preferences, and competition in the space. Product managers should take a data-driven approach to identify potential issues and develop targeted strategies to address them, while also staying flexible and open to experimenting with new approaches as needed.