This means:
“My neighbor showed me an easy method for removing green algae from the outside walls or siding of a house, supposedly with almost no effort.”
Breakdown
“My neighbor taught me this trick” = presents the method as a practical tip learned from someone nearby.
“Clean green algae off siding” = remove the green algae or similar organic buildup that can develop on exterior house siding.
“With 0 effort” = exaggerated wording meaning the cleaning supposedly requires very little work.
“Here’s how it works” = promises to reveal the cleaning method.
Tone
This is household-cleaning clickbait. The phrases “my neighbor,” “trick,” and “0 effort” make the method sound simple, secret, and almost effortless.
A simpler version:
“An easy method for removing green algae from house siding with minimal scrubbing.”
