An SEO glossary of terms every marketer should know in 2026
A practical, current glossary covering the essential SEO terminology every marketer should be comfortable with, from foundational concepts to 2026-specific terms.
6 min read
In March 2017, a broad Google update caused significant ranking volatility across a specific type of site: content-heavy pages with a high ratio of advertising to substance. Google never officially confirmed a name for it, but the SEO community nicknamed it Fred after a Google employee jokingly suggested naming every otherwise-unnamed update Fred — and the name stuck.
The sites hit hardest by Fred shared a clear pattern: content that existed largely as a vehicle for display advertising and affiliate links, with thin or low-value text wrapped around aggressive monetisation. Many affected sites had reasonable domain authority and backlinks, which meant the drop was specifically about content quality and user value, not technical or link-based factors.
Google frequently declines to name or confirm every ranking fluctuation, especially when it represents a broader quality signal refinement rather than a single, isolated update. Fred is best understood not as one specific event but as an early, visible sign of the same broader quality evaluation Google was already building toward with what eventually became the Helpful Content Update five years later.
Fred was never officially named because it was never really one thing — it was an early, visible symptom of a quality signal Google kept refining for years afterward.
The specific 2017 event is long past, but the pattern it targeted — content built primarily to serve ads rather than readers — remains actively penalised inside Google's ongoing quality systems. Sites relying heavily on programmatic display advertising or affiliate content still need to prioritise genuine usefulness over ad density to avoid the same fate under a different name.
Look at your highest-traffic monetised pages and honestly assess the ratio of substantive content to advertising. Google's Better Ads Standards and its own ad experience guidance are useful references for what counts as excessive. Our content audit guide covers a broader process for identifying pages that need a rebalance.
No. Google never officially confirmed or named this update — Fred is the nickname the SEO community gave it after a Google employee's joke about naming unconfirmed updates Fred.
Yes, provided the content offers genuine value beyond monetisation — real product testing, specific comparisons and honest recommendations rather than thin lists built mainly to place affiliate links.
There is no fixed percentage, but Google's ad experience and page experience guidelines both penalise ad placements that interfere with content consumption, particularly on mobile — as a rule of thumb, content should be the dominant visual element on the page.
If your content strategy leans heavily on advertising or affiliate revenue and you are unsure whether it carries this kind of risk, talk to our team about a quality review.
Check your ad-to-content ratio on your highest-traffic pages — Fred's core target, aggressive monetisation over genuine value, is still exactly what modern quality systems penalise.
Written by Fibvo — Bengaluru and Erode, India — working with clients in other time zones. Questions, or think we have it wrong? Tell us.
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