Chord Symbols are a standard way that musicians notate chords. But unlike universally accepted standard notation, where notes and rhythms are written on the staff, chord symbol notation can vary widely depending on where you live, the publications you read and the circle of musicians who influence you.
There are two parts to becoming comfortable with chord symbols:
Part One – you need to have an understanding of all the different ways the exact same chords are commonly notated. There are many options to become familiar with and some styles of writing chord symbols conflict with other styles.
Part Two – you need to adopt a style that you personally use when you write chord symbols that has the best chance of being understood by most musicians on the planet.
When you personally notate chord symbols for yourself or for others, it’s to your advantage to be neat and clear. Sloppiness breads uncertainty. So, if someone reading what you wrote is not certain about what you want them to play, they’re likely to play tentatively and the performance will suffer.