Update README.md

README.md

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-# Adform Tracking
+# Facebook CAPI Server Tag
 
-This is an unofficial Adform tracking tag for the Google Tag Manager Community Template Gallery. Please raise an issue if you find any bugs or have a question!
+This is an unofficial Facebook CAPI server tag for the Google Tag Manager Community Template Gallery. Please raise an issue if you find any bugs or have a question!
 
 ## Documentation
 
-### Adform Server Domain
+### API Access Token
 
-You can change the default domain of the server (usually track.adform.net) to suit your own needs. Do **not** change this if you were not explicitly asked to!
+In order to use Facebook's CAPI, you need an access token for the API. You can generate one [here](https://developers.facebook.com/docs/marketing-api/conversions-api/get-started#access-token).
 
-### Adform Tracking ID (pm)
+### Test Event Code
 
-This is the Adform client ID, also referred to as *pm*.
+You can verify that the tracking works as expected by using the Test Events Tool. [Read more](https://developers.facebook.com/docs/marketing-api/conversions-api/using-the-api#testEvents).
 
-### Tracking Point Name (pagename)
+### Action Source
 
-This is the name of the tracking point, also referred to as *pagename*. You can set this to a specific string, but it is recommended to either use URL path or custom *pagenames* when tracking across multiple pages.
-
-`{{Page Path}}` can be used and will generate a tracking point for each page the tag is fired on. You might want to exclude pages which should not be tracked when using the `All Pages` trigger.
-
-### Variables
-
-You can track [custom variables](https://support.adform.com/documentation/implement-tracking-points/standard-javascript/variables/) such as sales, order ids, product names or other custom values in addition to the default values.
-
-#### Variables Object
-
-You can use a variable which returns an `Object` to track custom variables. Any other type than `Object` is discarded.
-
-This is helpful when you need to include product data on certain pages, simply return the values you need on the product pages and `undefined` on the rest.
-
-#### Variables Table
-
-In addition to a variable, you can also use a table to track custom variables.
-
-### Optional Parameters
-
-#### Divider
-
-Tells Adform which character to use to split up the pagename. The default value is the pipe character `|`.
+You can specifiy where your conversions occurred. [Read more](https://developers.facebook.com/docs/marketing-api/conversions-api/parameters/server-event#action-source).