"Transparent" image with a grayscale checkered background
Hello,
I have tried to find a tutorial or something explaining how to use transparent images, but could not find one. Here is what I am trying to do:
I found a vector image online that says it's transparent and I want to overlay that with a photo of my A Cappella group. The vector image is just some light effects. But when I import the PNG file into Adobe Photoshop CC 2019, the background of the vector image is checkered and greyscale and I don't know how to change that or move the image to another layer or what. If you can help that would mean a lot. I am new to Adobe creative sweet. This may be a very complicated process, but I am ready and willing to learn. Also here is what the file looks like.

