Develop the habit of tuning your ukulele before playing
Playing the ukulele that is out of tune may frustrate your experience when attempting to learn new songs. You’ll find the notes you strum don’t quite match what you are listening to. Learning the chords to a song while your ukulele is out of tune will get you stuck. You may know where to place your fingers on the fretboard but the actual notes you are playing are not the intended notes from a tuned ukulele.
For this reason, before you start playing, you want to make sure that the first thing you do is tune your ukulele. There are a couple of ways to do this but the best way is to use an electronic tuner or download an APP on your smartphone.
(Resources from the web)