You simply need to tell Zapier to search for the record that you want to update.
Although if you’re just starting out and don’t yet have much time invested into Zapier already, it’s highly HIGHLY recommended to use Integromat instead of Zapier.
Zapier only has extremely limited support for Airtable, whereas Integromat has full Airtable support. Also, Integromat is a more powerful & more flexible — yet easier & less expensive — platform.
Note that I am a professional Airtable consultant and a Registered Integromat Partner, and the Integromat link contains my personal referral code.
