IX Bid Adapter: FPD (#2971)

* using fpd

* update headings in fpd

* update function reference path

Co-authored-by: Kajan Umakanthan <kajan.umakanthan@indexexchange.com>

dev-docs/bidders/ix.md

@@ -339,6 +339,35 @@ gulp build --modules=bidderModules.json
 
 ## Setting First Party Data (FPD)
 
+As a part of 4.30, IX will start to pick up FPD in the global FPD module, as well as continue to pick up IX bidder-specific FPD. Previous versions of IX Bid Adapter will only support the IX bidder-specific FPD.
+
+### Global FPD
+
+As of Prebid.js 4.30, use the more generic `ortb2` interface, which can be used for more than just First Party Data.
+
+The First Party Data feature allows publishers to specify key/value data in one place where each compatible bid adapter can read it.
+
+To supply global data, use the [`setConfig()`](/dev-docs/publisher-api-reference/setConfig.html) function as illustrated below:
+
+```
+pbjs.setConfig({
+ ortb2: {
+ site: {
+ ...
+ },
+ user: {
+ ...
+ }
+ }
+});
+```
+
+Use the [`setBidderConfig()`](/dev-docs/publisher-api-reference/setBidderConfig.html) function to supply bidder-specific data.
+
+For more information about the standard or more detailed examples, refer to [First Party Data Feature](/features/firstPartyData.html).
+
+### IX bidder-specific FPD
+
 FPD allows you to specify key-value pairs that are passed as part of the
 query string to IX for use in Private Marketplace Deals which rely on query
 string targeting for activation. For example, if a user is viewing a
@@ -366,6 +395,9 @@ pbjs.setConfig({
 The values can be updated at any time by calling `pbjs.setConfig` again. The
 changes will be reflected in any proceeding bid requests.
 
+{: .alert.alert-warning :}
+Continue to use IX bidder-specific First Party Data for IX deals. Global First Party Data is not yet supported in IX deals. Consult your IX representative with any questions.
+
 ## Setting a Server Side Timeout
 
 Setting a server-side timeout allows you to control the max length of time taken to connect to the server. The default value when unspecified is 50ms.