Merge pull request #4599 from segmentio/jfoskin-patch-3

Update QueryString Table

Author: rchinn1

src/connections/sources/catalog/libraries/website/javascript/querystring.md

@@ -5,13 +5,13 @@ strat: ajs
 
 Analytics.js can trigger Track and Identify events based on the URL query string. You can use this when tracking email click-throughs, social media clicks, and digital advertising.
 
-Here are the query parameters to use:
+Here are the *optional* query parameters to use:
 
 | Parameter             | Description                             | Triggers                                                                                                                                        |
 | --------------------- | --------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- |
-| `ajs_uid`             | The userId to pass to an Identify call. | This triggers an Identify call.                                                                                                                 |
-| `ajs_event`           | The event name to pass to a Track call. | This triggers a Track call.                                                                                                                     |
-| `ajs_aid`             | The `anonymousId` to set for the user.  | This function returns the current `anonymousId`. When a value is passed, this function sets an `anonymousId` value.                             |
+| `ajs_uid`   | The userId to pass to an Identify call. | This triggers an Identify call.                                                                                                                 |
+| `ajs_event` | The event name to pass to a Track call. | This triggers a Track call.                                                                                                                     |
+| `ajs_aid`   | The `anonymousId` to set for the user.  | This function returns the current `anonymousId`. When a value is passed, this function sets an `anonymousId` value.                             |
 | `ajs_prop_<property>` | A property to pass to the Track call.    | This won't implicitly trigger an event and is dependent on you also passing `ajs_event`. This property is included in the resulting Track call. |
 | `ajs_trait_<trait>`   | A trait to pass to the Identify call.    | This won't implicitly trigger any call and is dependent on you also passing `ajs_uid`. This trait is included in the resulting Identify call.   |