How can I use a dropdown selection as a filter on ANOTHER page?

I’ve been able to figure it out when the dropdown is on the same page where I need filtering, but how can I approach using a dropdown on a diff page to filter another page on the same website? Do I need to use a script or does Wix have a function to do this?

You will need to explain what you are trying to in order for us to provide assistance. What do you mean by “filter another page”?