Type Function Return value none Revision Release 2025.3721 Keywords ads, advertising, Appnext, setCategories See also appnext.getCategories() appnext.* 
Sets the preferred ad categories.
appnext.setCategories( adKey, categories )
String. The ad key returned for a previously created ad.
String. The preferred categories to be set for the ad.
local appnext = require( "plugin.appnext" )
local function adListener( event )
    print( "Received " .. event.event .. " for " .. event.adKey .. " with message: " .. event.message )
end
-- Initialize the Appnext plugin
appnext.init( adListener )
-- Create your ads
local interstitialPlacementID
local platform = system.getInfo( "platformName" )
if ( platform == "iPhone OS" ) then
    interstitialPlacementID = "YOUR_IOS_INTERSTITIAL_PLACEMENT_ID"
elseif ( platform == "Android" ) then
    interstitialPlacementID = "YOUR_ANDROID_INTERSTITIAL_PLACEMENT_ID"
end
local interstitialAdKey = appnext.createAd( "interstitial", interstitialPlacementID )
appnext.setCategories( interstitialAdKey, "Action, Adventure" )