The updated Explore also brings a new navigation bar with fast access to common features and tasks, including "more immersive" IGTV and Shop sections. Tap the IGTV section and you'll get a customized feed of recommended videos, while Shop now has category filters to limit your focus to goods like clothing or home decor. This update should arrive in the US starting today.

It's not surprising that Instagram would push Stories and other services in Explore -- it remains an important component of the app. More than half of Instagram users visit Explore every month, making it a showcase for Instagram's offerings. Don't be surprised if there's a surge of interest in Stories, IGTV and shopping, if just because they'll reach more eyeballs.