Learn how to make something happen when a text in a notification changes.

In this example I'll do a simply Flash action but you can do whatever you want

STEP 1 - CREATE PROFILE TO INTERCEPT NOTIFICATION

• Create a new Profile in Tasker
• Use the AutoNotification Intercept event condition
• Set it to only intercept created notifications
• Choose the app you want to intercept. In this case I'm going to intercept Google Play Music's notifications
• Accept these settings and create the task

STEP 2 - CHECK IF TEXT CHANGED

• In the task add a new If action
• set the condition to check if %antext doesn't match %LastText

%antext is a variable that represents the intercepted notification's text. %LastText is a variable that will contain the last text that was intercepted. We will set its value in the next step

STEP 3 - DO SOMETHING AND SET LAST TEXT

• Add any action you want inside the If block. In this case I used a simple Flash action
• After your actions add a Variable Set action where you set %LastText to %antext

This will make the %LastText variable contain whatever was in %antext so that the next time this task runs it will check the new intercepted text agains this value and run the actions if it's different

• Close the If with an End If action

STEP 4 - TEST

• Back out of Tasker so that this profile is saved
• Open Google Play Music
• Play a remix of a song. This will most likely make subsequent songs have different artists which is what the notification's text will contain
• Now you'll see that when the playing artist changes, you'll get a flash showing the new Artist that's playing