You'll find the resource that the town produces the most of, the workshop you need to construct to take advantage of this, and how many villages feed the resource into the town. The best way to navigate this table is to use the search function on the top right of the table and to enter a town's name. I've created a similar version of 'Droblue's' table with some alterations and corrections based on my own findings.
Over on Reddit, 'Droblue' has compiled a list of the best workshops to construct for your towns. Best workshops in Bannerlord for each town
