Adding Categories in WordPress helps you group posts together and it also helps people find your content. It is the cornerstone of good content organization.

STEP 1

Depending on your theme that you are using categories can be displayed at the top or bottom of the post

On your Left side bar menu you will see posts and under it you will see categories

STEP 2  Adding information for the category

After clicking on Categories you will be able to enter the name and description for the category

STEP 3 Adding the Post to the category

After putting in the information for your post depending on your theme set up and widgets you will see a categories widget around the top or bottom of the page; and there you can choose which category you would like to put the post in, then you check that box and update it.