How to crete a template with multiple variable and to create CSV file to run the campaign ?

video1.0<iframe src="https://www.loom.com/embed/112173f924b9459cbf705e62cdc5a5c2" frameborder="0" width="1280" height="960" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>9601280Loomhttps://www.loom.com9601280https://cdn.loom.com/sessions/thumbnails/112173f924b9459cbf705e62cdc5a5c2-1b753248a265c328.gif309.833How to crete a template with multiple variable and to create CSV file to run the campaign ?