There are a number of ways to connect Airtable with Webflow, including Nobull Airtable and PowerImporter. Depending on how you are syncing data between Airtable and Webflow, slugs may be created for you. If you are not using a third party tool and syncing data directly from Airtable to Webflow via Webflow's API, you will need to pass in a slug. Use this video and the code snippet below to create the required slugs quickly and automatically.
Here is the code snippet shown in the tutorial to create slugs in Airtable based on content in another field: