Bullet symbol also called glyph. It is usually preferred when typing a list of items in a word text to place the bullet symbol before the item. Bullet symbols are used in different kinds of writing, like notes, technical writing, and presentations. The bullet symbol takes different shapes like square, circle, dash, diamond, or arrow. Some computer software provides various colors and shapes.
Regular symbols like asterisks, a hyphen, period and sometimes lowercase o were widely used where bullet symbols were not available. The index symbol was famous too sometimes.