Croeso. It's taught on most courses but you'll hardly ever hear a first language speaker use it in every day conversation.
That's one thing that people don't get taught much in classes or on courses, the differences in types of speech. That's why it's important to listen, read and get out there and use the language yourself and become your own linguistic detective and tutor. Please feel free to contact me if you have any questions ever. Dw i'n hapus i helpu!