Roundup: mobile-first, seen in logs

Roundup: mobile-first, seen in logs

When the crawler's user-agent flipped, logs told the story.

→ Merj mobile-first case — tracked the ratio of smartphone-Googlebot to desktop-Googlebot in logs across a switchover; it went from 12% to 94% over five weeks, confirming the site had moved before GSC announced it.
Takeaway: the user-agent split in logs is your early signal.

⭐ Pick of the week — Onely parity audit — found the mobile Googlebot was being served a stripped template missing 30% of internal links, visible only by diffing what each UA fetched next. Fixing it restored crawl depth.
Takeaway: serve both bots the same links, and verify in the log.

→ Google mobile-first docs — the official criteria behind the shift.
Takeaway: background for the cases above.