This is the most immediate downside. Sites like Jokerbet TV survive by serving aggressive advertisements. The moment you click to start a stream, you will likely be bombarded with pop-ups, redirect ads, and fake "Download" or "Update" buttons. Accidentally clicking one of these can install malware, adware, or tracking cookies onto your device.
These sites typically provide live broadcasts for various leagues, high-definition (HD) quality options, and sometimes community chat features for viewers.