How to upload images to categories?

Urgent!! I am creating a photo contest for my work and I have created 4 categories but cannot figure out how to upload images to the categories, please advise.

Our voting category feature is meant to create categories in which each photo is rated. If you want to upload images to a category you need to create a PollUnit photo contest per category.

Additionally you can create a PollUnit Landing Page to group your categories. You can then simply share the link to the landing page.