Duplicate URLs split your ranking signals in half without anyone noticing. They’re boring to fix and almost always worth it.

Trailing slash duplicates

/page and /page/ resolving separately is one of the most common issues — pick one and redirect the other.

Parameter sprawl

Filters and tracking parameters can spawn thousands of near-identical URLs. Canonicalise or block them before they eat your crawl budget.

Language folders

An /en/ version competing with the root for the same audience cannibalises both. hreflang and clear canonicals keep markets from fighting each other.