Meaning
A glowing light bulb, the classic cartoon sign that someone just had an idea. Literally it is a lamp; figuratively it is the moment something clicks.
Use it for brainstorming, tips and sudden realizations: “💡 What if we split the trip into two weekends instead?” Creators put it at the start of a pro tip, and depending on context it can also be a reminder to save electricity or turn the lights off.