Google updates its search algorithm thousands of times per year. Most changes are minor and go unnoticed. But several times a year, Google releases significant “core updates”, broad changes to how it evaluates content quality, relevance, and authority that can cause substantial ranking movements for websites across every industry and geography, including South Africa.
Understanding how these updates work, what they tend to target, and how to respond when they affect your SA business is a practical necessity for anyone with a serious SEO programme.
How Core Updates Work
Core updates are not targeted at specific types of spam or manipulation (Google has separate “spam updates” for those). They are recalibrations of the overall quality assessment system, changes to how Google weights different signals of content quality, expertise, and relevance when ranking pages.
A core update might improve Google’s ability to identify pages that genuinely demonstrate the author’s first-hand experience. It might recalibrate how topical authority is assessed. It might improve Google’s understanding of which pages best match complex, multi-intent queries. The specific mechanisms are rarely disclosed in detail.
The practical effect is that some websites gain rankings after a core update and others lose them, not because they did anything different immediately before the update, but because Google’s assessment of their relative quality changed.
Recent Algorithm Changes Most Relevant to SA Businesses
Google’s Helpful Content System, rolled into core updates since 2023, continues to be the most significant ongoing algorithmic force for content-heavy SA websites. It evaluates whether content was created primarily to serve users’ informational needs or primarily to generate search traffic, and it demotes the latter.
SA websites that have accumulated large volumes of thin, keyword-targeted blog content without genuine depth or expertise have been among those most affected by successive helpful content assessments. Conversely, SA businesses that have consistently produced genuinely useful, expert-led content have generally seen ranking improvements.
Google’s spam updates target specific manipulative practices: scaled content abuse (producing high volumes of low-quality AI or templated content), site reputation abuse (large publishers hosting low-quality third-party content to benefit from their Domain Authority), and expired domain abuse. SA businesses that have purchased aged domains to build link authority have been particularly affected by the expired domain update.
How to Recover from a Core Update Hit
If your SA website loses significant organic traffic following a core update, the first step is diagnosis before action. Determine whether the traffic loss is across your entire site or concentrated in specific sections (such as your blog versus your service pages). Identify which queries and pages saw the sharpest declines in Google Search Console.
A site-wide decline often indicates a broad quality signal issue, potentially thin content, weak E-E-A-T signals, or over-optimisation patterns. A decline concentrated in the blog section, for example, often indicates that specific categories of content were negatively reassessed by the helpful content evaluation.
The correct response to a core update hit is almost never an immediate technical change or link-building push. It is a content quality audit. Identify the pages that declined most sharply. Assess them honestly: is this content genuinely useful, or does it exist primarily to rank for a keyword? Does it demonstrate real expertise? Does it provide information specific to the SA context it claims to serve? Does it have a clear, genuine author with relevant credentials?
Pages that fail this self-assessment should be improved, consolidated with stronger pages, or removed. Google’s guidance is consistent: sites that recover from core updates typically do so by addressing the underlying quality issues, not by making superficial changes or waiting for the next update to reverse the movement.
Staying Informed About Algorithm Changes
Several sources track and analyse Google algorithm changes in near-real-time. Google’s own Search Central Blog publishes official announcements for major updates. Search Engine Land, Search Engine Roundtable (Barry Schwartz’s site), and Semrush’s Sensor tool all provide reliable tracking of ranking volatility and analysis of significant algorithm events.
Subscribe to at least one of these sources and review them at the start of each month. When significant ranking changes appear in your Search Console data, cross-reference the date against known algorithm updates before making any content or technical changes, the cause informs the appropriate response.
Request an algorithm impact audit if your SA site has experienced unexplained ranking volatility and you want a professional assessment of the cause and the appropriate response.