The meaning behind those colorful balls on power lines

They’re not for decoration but serve an important purpose.

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What Are Those Colorful Balls on Power Lines, Exactly?

What Are Those Balls That Hang On Power Lines - Engineering Discoveries

What Are Those Colorful Balls on Power Lines, Exactly?

What Are Those Balls That Hang on Power Lines?

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What Are Those Colorful Balls on Power Lines? – LifeSavvy

What Are Those Colorful Balls That Are Attached To Power Lines? » Science ABC

Marker Balls on Power Lines

A Rainbow of Safety: The Story Behind the Balls on Power Lines - EnergyBot

What Are Those Colorful Balls That Are Attached To Power Lines? » Science ABC

What Are Those Balls That Hang On Power Lines - Engineering Discoveries

Great Balls of Wire Set of Two Black and White Cord Organizer