As you're likely already aware, the action of DoSing or participating in DDoS is illegal, and for good reason.
Click on continue if you have a VPN Enabled, use a proxy, use the Tor browser or have your own secure connection and wish to support Ukraine in taking down Russian propaganda.
This works by sending GET requests to each targeted website.
It’s like opening each website at once on your PC and
re-requesting the data over and over, although the data is not saved or cached, It should be fair to say that your Internet service Provider (ISP) won’t be any more bothered about this than they would you browsing the internet, but its best to stay safe.