I'm sorry if the photography prompt has caused any confusion.
Basically polarizing filters help to reduce reflections from water as well as metal and glass; they improve the colors of the sky and foliage [usually by darkening their saturation] and will help give your photos the WOW factor.
Nearly all photo apps now come equipped with a polarization filter function... but if you don't have one, it's really not that big of a deal. Just pick something that gives a similar effect. It's simply about enhancing photos by reducing glare, sharpening details, and darkening colors.
Here's a few more side by side example of what effects a polarization filter has on a photo:
Without Filter......................................With Filter
Does that help you guys to see/visualize the difference? I do most of my photo editing on my phone using apps [there are sooo many fantastic freebies!]... but if you don't work that way, or you don't have an app that offers a polarization function just go ahead & edit your photos like you normally would, trying to shoot for similar results. I think Jacinda's tips above would make that approach easy. Sound good? Please let me know if you still have any other questions.