What does the weather forecast mean by water droplets?

The contents of the two red circles in the weather map indicate the future precipitation range. Heavy rain, moderate rain and light rain indicate the degree of rainfall.

(The colored bars indicate that blue and green represent light rain, yellow represents moderate rain, and orange, red, crimson and purple represent heavy rain. ) One raindrop on the left has less precipitation, the three raindrops on the right have more rainfall, and the deep purple on the right indicates heavy rainfall or rainstorm.