Tuning your guitar is an essential skill. Its great to have electronic tuners but its also great to develop your ear so you can hear when strings go out of tune. This can happen more often if you are playing the guitar very hard or bending strings. The standard guitar tuning is from lowest to highest E, A, D, G, B, E. There are many popular alternative tunings like DADGAD and others where the guitar is tuned to a chord. The great thing about experimenting with guitar tunings is it forces you to think differently on the fretboard, or may inspire a different approach to a song. Try some different approaches using our guitar tuner above and you can read about them below.
With these tunings they should be fun and inspire you to new directions. If you are beginning there is no need to learn alternate tunings, you can just stick with standard tuning and spend time learning all the other stuff there is to learn on the guitar. There are some artists who constantly use alternate tunings, but many guitarists spend most of their lives in standard tuning, maybe with an occasional drop D. It is good practice to memorise the notes that make up Standard tuning.