Mobile viewing

Hi there –
I have created a few pages in my WP site that have images that are separated by columns with shortcodes. On my computer monitor, they work perfectly. When I looked at my site today for the first time on my cell, I see that the images on those pages are stacking or laying on top of one another or the columns appear to be pushed to one side. Any wisdom on why this is happening and/or how to fix would be most appreciated.
Thanks much!