And why does it matter?
https://yourservername.com/logo.svg
Next is an optional but recommended step. To fully embrace BIMI, your brand should acquire a VMC, or a Verified Mark Certificate. This will help validate the true ownership of the logo being used. More on this in the section below.
Finally, you will need to create a TXT record for BIMI in your DNS records. This record will contain a URL to your logo for the email provider to grab and display.
The full implementation guide from BIMI can be located here.