ゼロからdefinitely means "we did everything ourselves" aka from scratch. They've been running ads on the little video-panels on at least some of the subway trains

ゼロからdefinitely means "we did everything ourselves" aka from scratch. They've been running ads on the little video-panels on at least some of the subway trains in Tokyo recently, pushing the idea that Chrome makes your browsing experience super fast. I'll leave the judgement of whether this is intentionally deceptive or an innocent marketing goof to you.