Sizing for Whatsapp Advert

Graphic Design General
#1

What’s the best format for a whatsapp status advert? PNG or JPEG?
And what size should I make it?

#2

general - 1080 x 1920 px
square- 800 x 800
sometimes 750 x 1334 px

#3

@adinacahn What’s the square size for? Is that for profile images?

#4

For a status image advert