Hello @YogawithChaz ,
We do have some templates specifically built for direct feedback or review testimonials from customers.
If you'd prefer to build from scratch, it's advisable that you link directly to any review sites / methods you prefer or check regularly. Review sites should have ways to link directly to your organization's page on their sites, so you'd just add that URL as a link in your email.
See also:
Inserting text links
Inserting image links
Inserting button links
Another option if you're using either, is to setup a mailto: link so contacts can email their feedback to a dedicated address, as well as with a specific subject line.
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