How do you get good at identifying chords?
Use the “Training” tracks to listen carefully to each type of chord and tune your ear in to the different sounds. Each time a chord is played, it is then announced and played note-by-note so you know what you're hearing. Then listen to the corresponding “Test” tracks, which include a short pause after each chord.
How do you identify chords?
Go back and forth between major and minor thirds until your ear starts to memorize the different sound of the two intervals. Using your ear memory to identify what major and minor thirds sound like is one of the first steps to start training your ear to recognize chords.