Quebec City, Canada
If you judge an SEO agency by how well they treat their own domain, L'Effet Monstre looks legit. Strong domain authority and a real market presence tell you they’re not just talking about visibility, they’ve actually built it for themselves. The growing backlink authority from diverse sources is a big trust signal too, because it usually means they know how to earn links, not just buy or spam them. Do they practice what they preach? From this snapshot of their own domain performance, yes. Based on this, I’d put them on the shortlist to hire and then dig into case studies and strategy fit.
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