You can control which sites allow cookies to be used from the browser settings on your device.
And you can control the tailored advertising you see online, by changing the cookie settings on your social media accounts or the websites you visit.
You may need to turn cookies off separately on each device and browser you use to access online content. You can generally do this via your browser settings.
It’s worth knowing that turning cookies off may mean the websites you visit have limited functionality, and the advertising you see is generic (or less relevant to you).