Merge pull request #785 from plausible/Hricha-Shandily-patch-14

PII examples link

Author: Hricha-Shandily

docs/custom-props/introduction.md

@@ -35,6 +35,8 @@ Note that you must ensure that no personally identifiable information (PII) is s
 * IP addresses
 * pseudonymous cookie IDs, advertising IDs or other pseudonymous end user identifiers
 
+If you're confused whether the information you're sending to us qualifies as PII, look at the [explanations and examples](https://plausible.io/blog/pii-examples) in our guide.
+
 ## `(none)` values
 
 Plausible will display `(none)` in your dashboard when you send a custom property key with no value, or `null`/`undefined` as a value. Also, when you send one event with a property (e.g. `author`) and another event with the same name, but without the `author` property, then you will also see the `(none)` value because the property has not been sent with every event.