• Passwords - Change them on a regular basis, and ensure you are using a strong password.  Don't use the same password for multiple sites.
• Browser Privacy Settings - There are some good browsers out there, but if your browser was made by an advertising company, change your browser; Brave Browser looks promising.
• Re-check Your Online Safety - Look to secure your privacy with apps which will protect your privacy: Ad blockers, Pop-up blockers, Anti-malware scanners etc.
• Social Media  - consider how often you actually use a platform - uninstall the ones you can live without

The UK regulator, the Information Commissioners Office has guidance ICO : Online Safety

Remember

If you are representing an organisation or promoting your business interests then, even if you are doing so through your own social networking pages, you will be subject to the Data Protection and Privacy legislation.

Data Protection Act 2018

This legislation could be of interest for those with children that go online.  It lowered the age of consent to 13, for children using Information Society Services (ISS).  or in layman's terms "any service normally provided for remuneration, at a distance, by electronic means and at the individual request of a recipient of services"; so most commercial websites, social media etc. - because it's nearly always about getting some money.

Check which site(s) your children are visiting and if necessary apply the appropriate filters, set time-limits via your router,   Keep them safe online!