What does the percent chance mean?

The number next to yes. 62% means the crowd thinks it happens about 6 times out of 10.

Every Foresee market leads with one big percent. That's the chance, the crowd's live estimate that the answer ends up yes.

It is not a promise. A 62% chance still misses 4 times out of 10. Reading percents this way, as long-run frequencies, not verdicts, is the single most useful skill this whole hobby teaches.