Pop Beats and Instrumentals

What is Pop? I mean, nowadays, what’s the difference between Pop music and Trap music? Because at this time I’d catalog Trap music as nowadays Pop music. It’s the trend, and it’s all about the sounds. Back in the years the sound was a bit more band-boy rockish, followed but that Ke$ha and Taio Cruz electronic sound but… Now the definition of Pop beats could’ve changed.