Change the root and the type to get an instant visual representation of how the chord looks.
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A chord is a few notes played at the same time. On guitar, you can play chords by holding some notes with your fretting hand, and strumming the strings. If you change the notes you're holding, you'll be playing a different chord.
As you can see above, there are lots of different chords you can learn! The good news is that if you learn just a handful of the most common ones you can play most popular songs. These are often called "cowboy chords" – they're the chords everyone needs to know when jamming around a campfire. Check out this handy guide!
If you're a more experienced player, you can try learning whichever chords you need from the above library. While it's interesting to simply choose new chords and learn them, the best approach is to learn chords you need when you come across them in songs. For example, learning E7#9 is handy, but you'll learn it better if it's in a song you're playing (hint... Hendrix...).
It can be tough learning chords: finding the ones you really need, getting your fingers to cooperate, memorizing them, building speed, and being able to play them in songs. Luckily, the interactive guitar-learning app Yousician is an excellent way to do this. It has teacher-crafted lessons to help you learn new chords at your own pace, gives you awesome popular songs that are right at your ability level, helps you build skills with mini-game chord workouts, and more.
Once you've learned your basic cowboy chords, Yousician can help you tackle the much longer list of harder chords that comes next. From all the chords with imposing fancy names like A7sus4 to all the hand-cramping barre shapes, Yousician can help you learn and master them in bite-size chunks so you don't get overwhelmed.