First head over to the products page and view the table of products.
Find the product you wish to generate tags for, and hit the green 'Manage' button at end of the desired product row.
This will load you into a 'Manuals' page. From here you can hit the big grey 'Push Tags To Shopify' button, which will ask for confirmation on how you wish to push.
Each time you try to save and push tags to Shopify, it will give you two options. 'Replace' and 'Append'.
Replace will overwrite any current tags for that product on Shopify and replace will all the tags saved against the product in AI Tagit app.
Append will add any different / new tags to the end of the product on Shopify making sure you dont loose the tags already in place
