Floaters or spots are small, semi-transparent or cloudy particles within the vitreous, which is the clear, jelly-like fluid that fills the inside of the eye. The spots can appear as specks of various shapes and sizes, threadlike strands or cobwebs. (AOA - American Optometric Association).

Some helpful/educational articles include:

AOA - Causes, Symptoms, Treatment of Floaters and Spots

Mayo Clinic - Symptoms and Causes of Floaters

NIH - Information and Treatment for Floaters

All About Vision - Types of Eye Floaters

Cleveland Clinic - Eye Floaters and Flashes