Here are some steps you can take to secure your Facebook page:

Strong Passwords and Two-Factor Authentication:

Use strong and unique passwords: Avoid using the same password for your Facebook page as you do for other accounts. Create a password that is at least 12 characters long and includes a combination of uppercase and lowercase letters, numbers, and symbols. Consider using a password manager to help you create and store strong passwords.
Enable two-factor authentication (2FA): This adds an extra layer of security by requiring you to enter a code, in addition to your password, when logging in from a new device. You can choose to receive this code via text message, a third-party authentication app like Google Authenticator, or a security key.
Manage Access and Permissions:

Limit the number of admins and editors: Only grant admin or editor access to individuals who need it to manage your page. Regularly review your list of admins and editors and remove anyone who no longer needs access.
Restrict posting permissions: You can control who can post directly to your page. Choose between everyone, admins and editors only, or specific people and groups.
Review App Permissions: Be cautious about granting permissions to apps you connect to your Facebook page. Only connect to apps you trust and regularly review the permissions granted to each app.
Privacy Settings:

Review your privacy settings: Make sure your page is set to the desired privacy level. You can choose who can see your posts, who can send you messages, and more.
Limit who can see your friend list: Decide who can see your friend list, making it harder for unauthorized individuals to target your friends.
Turn off location services: If you don’t need your page to share its location, turn off location services.
Additional Security Tips:

Beware of phishing scams: Never click on suspicious links or enter your Facebook credentials on unknown websites. Be cautious of messages claiming to be from Facebook or other official sources.
Keep your software updated: Ensure you have the latest updates for your operating system and web browser to address potential security vulnerabilities.
Be mindful of what you share: Avoid sharing personal information on your Facebook page that could be used to compromise your security or privacy.
Report suspicious activity: If you notice any suspicious activity on your page, such as unauthorized login attempts or unauthorized posts, report it to Facebook immediately.