Whenever a product is added, removed, or updated in the software, it is automatically updated on your website.
Time it Takes for Changes to Show on Website
If you are making changes directly in WordPress, they should appear immediately, but see below to clear the web server cache if not.
It typically takes 5-10 minutes for changes made in your inventory/categories to update on your website. This is unless you have a very large inventory (in which case it can take 1-2 hours). If it's still not showing the changes after 15 minutes, you can try logging into your WordPress website and clearing the website server cache by going to Purge cache -> purge all cache in the WordPress toolbar at the top.
See more info about clearing your cache, here.