Core Updates, COVID-19 Impacts, and the Evolution of Search Behavior
The year 2020 was unlike any other, as the COVID-19 pandemic reshaped digital behavior, accelerated ecommerce, and forced businesses to rethink their online presence. For SEO professionals, the year presented a blend of algorithmic changes, user intent shifts, and an increased focus on relevancy and adaptability.
Core Algorithm Updates
Google released three major core updates in 2020, all of which had far-reaching effects across industries.
January 2020 Core Update
This update set the tone for the year by emphasizing content trustworthiness and topical authority. Several health, news, and YMYL (Your Money or Your Life) websites experienced significant volatility. E-A-T signals appeared to be critical in evaluating content quality.
May 2020 Core Update
This was one of the broadest and most disruptive updates of the year. Deployed at the height of the pandemic’s first wave, the update appeared to reward in-depth, accurate, and up-to-date content. Many businesses saw changes in rankings based on how relevant and helpful their content was in a rapidly changing world.
December 2020 Core Update
The year ended with another significant update. Though not officially tied to COVID-related search behavior, the update continued to prioritize expertise and user-focused content. Sites that maintained consistent publishing strategies and strong technical SEO fundamentals often recovered from previous losses.
COVID-19 and Search Behavior
The pandemic transformed the search landscape:
- Search queries shifted drastically toward topics like health, safety, remote work, and online shopping
- Google introduced the COVID-19 Announcement Structured Data to support government and health agencies
- Local SEO became essential, with users searching for adjusted business hours, curbside services, and delivery options
- Volatility increased for sectors like travel and hospitality, while ecommerce and home fitness saw rapid gains
SEO professionals were tasked with reacting quickly, updating content, improving local listings, and supporting real-time communication.
BERT and Natural Language Processing
While BERT (Bidirectional Encoder Representations from Transformers) launched in late 2019, its full rollout across more languages and devices took shape in 2020. BERT helped Google better understand the nuance of search queries, especially conversational phrasing and long-tail questions.
For SEO, this meant:
- Less emphasis on exact match keywords
- Greater focus on intent matching
- The need for clearer, more contextually relevant copy
Featured Snippets and Zero-Click Results
Featured snippets remained volatile in 2020, with Google testing the removal and reintroduction of certain snippets depending on the query. In January, Google also changed the way featured snippets worked by removing the duplicate organic listing when a site appeared as a featured snippet.
This impacted SEO strategies targeting position zero and forced some teams to reconsider the value of snippet visibility versus standard ranking.
Passage Indexing Announcement
In October 2020, Google announced Passage Indexing (later launched in 2021). Although it was not live in 2020, the announcement gave insight into the future of content evaluation. Google would soon be able to index and rank individual passages within a page, not just the entire document.
SEOs began preparing by improving content structure, enhancing subheadings, and aligning content with specific search intents.
E-A-T Continued to Shape Visibility
Though not a formal algorithm, expertise, authoritativeness, and trustworthiness remained foundational for many industries. Health, finance, and ecommerce websites were evaluated more critically, with transparency, proper sourcing, and reputation playing major roles in performance.
Sites that invested in author bios, credible linking, and content updates saw more consistent rankings throughout the year.
Strategic Takeaways for SEOs
- Agility was critical
The pandemic demanded fast content updates, dynamic schema usage, and flexible publishing workflows. - Local SEO was mission-critical.
Google My Business became a lifeline for many local operations. Attributes like “curbside pickup” or “temporarily closed” affected visibility and user trust. - Content quality and structure mattered more than keywords
With BERT and upcoming passage indexing, Google continued to reward semantic clarity and user-focused writing. - SERP real estate evolved
The removal of duplicate results from featured snippets changed ranking strategies. SEO became less about one position and more about total visibility.
Conclusion
2020 was a year defined by uncertainty, but also one that revealed the resilience and adaptability of the SEO community. While technical updates continued, the broader shift was toward user-centered, intent-driven content supported by trust and relevance.
For SEO professionals, success in 2020 was less about optimization in isolation and more about understanding human behavior in a time of disruption—and aligning strategies accordingly.