Is a woman's intuition real or just a guess?

When a woman say’s it their “woman’s intuition” what is that? Is that simply a hunch, a guess, instinct? What does it really mean when someone says “it is/was woman’s intuition”?

I have heard this over the years that you should always trust a woman’s intuition…why is that? How is that so trustworthy and accurate? Does anyone have real life examples of woman’s intuition that show how this ability is so special over just guessing? Is simply saying “oh it was woman’s intuition” simply an excuse over not having a better answer??