Those two lines we searched for signifies that this is the activity which is going to start when we launch the app from the launcher icon, and also this is a MAIN activity similar to the 'main' function in traditional programming.
For most users, the revamped interface will be the most important update. There are even a ton of material design icons and multiple themes to choose from. Still, with all those changes, it's entirely possible the developer has addressed some edge case that is particularly important to you and only you. Tasker is a paid app, but there are scant few alternatives if you need a powerful automation app. It's only $3, though.
dd2b598166