I grew up in France, I studied statistics but I only heard the term p-Value for the first time a couple of years ago when I started to work on search engines. I was used to hear about confidence intervals at 95%. But we are talking about the same thing as explained here.
It goes on with the specific case of a binomial law. Assuming we want to determine whether or not two binomial laws are significantly different, how many observations we need to get the p-value under a given threshold.