Email unsubscribe rate is the percentage of subscribers who leave your brand's email list.
Here's Jeremy for more:
What Is the Average Unsubscribe Rate for Emails?
For DTC eCommerce brands, Daasity has seen an unsubscribe of around 0.5% for an entire account.
Why Is Email Unsubscribe Rate Important?
The biggest reason unsubscribe rate is important to track (besides understanding how many people are leaving your email lists) is because having a high unsubscribe rate will cause email clients like Google, Outlook, and Yahoo to move your emails to promotion or spam folders.
For content on related metrics, head over here to learn about Email Open Rate and over here to learn about Email Click Through Rate.