Have you read about the subject or measured it on your own?
Use the networking section of the developer tools in your browser. On a mainstream site I was just visiting, the page itself was about 50 kilobytes and it downloaded just under 3 megabytes of ad and tracking JS.
Use the networking section of the developer tools in your browser. On a mainstream site I was just visiting, the page itself was about 50 kilobytes and it downloaded just under 3 megabytes of ad and tracking JS.