A melody is a single line or 'voice' of music notes. That means that at any time, there is no more than one note playing.
For example, the human voice is only capable of producing melodies - multiple singers layering notes on top of one another are required to produce chords.
What is a chord?
A chord is when two notes or more are layered over one another and repeated as a secondary layer to a song.
Chords are usually used to support a melody.
How does this apply to the Ukulele?
Chords
This is what we've been playing so far when learning songs on the Ukulele. This is the typical use of a Ukulele, to play chords and sing over them.
Tablature
Tablature is used when we want to learn how to play a melody on a Ukulele, if you want to play one string and note at a time.
What is tablature (TAB)?
Ukulele TAB has four horizontal lines which represent the Ukulele strings.
The bottom line is the string closest to your face, and the top line represents the string closest to the floor.
In order from your face to the floor, the strings are tuned to G, C, E and A.
A good way to remember this order is Good Children Eat Apples.