Please accept my facetiously offered apologies, I forgot that I need to spell everything out for you.
See, at the bottom of your 'phone, there's a little rectangular hole with rounded corners. It's often called a charging port. If you connect an appropriate cable, the little number 43 on the top right of your screen will start to climb, aaaallllllllll the way up to 100.
That's the battery level for your 'phone, and yours is almost as bad as mine. The closer to 100, the healthier your 'phone's battery.
Also, if you make a swiping gesture downwards from the top of your screen, you'll see an expanded version of your Instagram notification, the one that's in the top left.
You posted a screenshot of a photo of a mural, so these things are clear to see.
With the utmost sincerity, and a grovelling apology for my misdemeanour, I hope that you now have a better understanding of my joke.