Google SEO
April 2015 — Search Engine Land · Ahrefs
What changed with Mobilegeddon?
Mobile friendliness became a ranking signal for mobile searches. It was a strong early incentive for the industry to redesign websites for mobile use.
Further analysis
Use this entry as an audit checkpoint. The cited source establishes the context; the direct answer identifies what to check before choosing an action.
In SFT, this topic relates to Structure. Check whether the signal is visible on the page, connected to the rest of the website and supported by understandable evidence.
Related search terms include Mobilegeddon, mobile friendly, 2015. Use them to describe the issue in a brief, audit or answer page.
Applying SFT
Structure turns a rule into readable architecture: headings, URLs, structured data, visible content and clear hierarchy.