Pwn2Own is a hacking competition in which security researchers demonstrate working exploits against real, fully patched products and win cash prizes and sometimes the device itself. Targets have included browsers, operating systems, phones and other widely used software. It takes place under agreed rules, with the findings disclosed to the affected vendors.
The event is valuable because it shows what skilled researchers can achieve against current defenses, and it gives vendors detailed reports to fix. Vendors are normally given time to release patches before technical details are published, which helps protect users.
A Pwn2Own result is a demonstration under controlled conditions and does not mean a flaw is being exploited against real users. Exploits are often prepared in advance for a specific version and configuration, and the same flaw may be harder or easier to use against other setups. The competition also covers only the targets and categories that organizers choose, so it is not a complete picture of risk.
When an article cites a Pwn2Own result, check which product and version were involved, whether the vendor has issued a fix, and whether your own deployment is affected. Apply the vendor's update as it becomes available, and treat the competition as a signal about how serious a class of problem can be, not as proof of attacks in the wild.