Question: what are the white dots on ukulele chords?
Answer: Fret dots. They help players quickly visually identify what number fret they are on. On a ukulele they are usually found on the 5th, 7th, 10th, and 12th frets. Sometimes they have more or less, like the adding the 3rd fret, only the 7th, or sometimes instead of the 10th they have the 9th.