SEO Concepts

5 Must-Know SEO Concepts You Must Follow

Here are 5 key SEO ideas to master in 2021, ranging from Core Web Vitals to the Knowledge Graph, semantics, and entities.

Last year saw a stratospheric rise in the significance of SEO, with a renewed emphasis on providing the greatest possible user experience.

Staying on top of basic SEO ideas is crucial, from the rollout of mobile-first indexing to the forthcoming deployment of Google’s page experience upgrade and Core Web Vitals.

As we prepare for success in the rest of 2021, it’s crucial to comprehend these five key SEO ideas.

1.   Core Web Vitals

Google’s Page Experience and Core Web Vitals, which is set to launch in June this year, is something that both technical and non-technical SEO practitioners should be aware of right now.

Core Web Vitals are a new set of guidelines that Google will employ to determine if a website offers a positive user experience.

These are the metrics:

  • Largest Contentful Paint (LCP): Measures the speed at which a page’s main content is loaded. This should occur within 5 seconds of landing on a page.
  • First Input Delay (FID): Measures the speed at which users are able to interact with a page after landing on it. This should occur within 100 milliseconds.
  • Cumulative Layout Shift (CLS): Measures how often users experience unexpected layout shifts. Pages should maintain a CLS of less than 0.1.

To benefit from the related ranking signal, Google has specified that the minimal level for all Core Web Vitals must be satisfied.

The following are some crucial points to consider:

  1. The mobile experience.
  2. Image compression.
  3. Informational page content.
  4. Site speed and technical structure.

 2.   Mobile-First Indexing

Read more on Core Web Vitals below:

Google: Core Web Vitals Becoming Ranking Signals in May 2021

Research: Core Web Vitals Ranking Boost by Industry

Google On Expected Impact of Core Web Vitals Update

Late last year, Google stated that mobile-first indexing will be the new standard.

The age of mobile is come. This means that your ranking signals will now originate from your mobile site rather than your desktop site.

Mobile devices account for over 55 percent of all online traffic, and this number is anticipated to rise. What you might not realize is that having a mobile-friendly website is no longer enough; you must now be “mobile-first.”

To put it another way, it’s time to stop thinking about mobile as an afterthought to your desktop site and start putting mobile SEO first.

Here are some suggestions for improving your mobile SEO:

  • Take the Mobile-Friendly Test.
  • Fix broken links and incorrect redirects.
  • Compress any uncompressed images.
  • Remove unplayable content and blocked resources (e.g., JavaScript, CSS, specific images).
  • Eliminate intrusive pop-ups and interstitials.
  • Improve mobile usability (e.g., text size, viewport configuration, tap target size).
  • Run an audit of your mobile site to find any additional site elements (e.g., structured data, title tags) you can optimize for mobile.

3.   Machine Learning and Automation

Machine learning is currently a key component of search engine ranking algorithms, with Google naming RankBrain as their third most significant ranking signal in March 2016.

Semantic search and machine learning are closely connected topics. It allows search engines to make informed estimates about what ambiguous searches mean, resulting in improved overall search results.

RankBrain and other machine learning algorithms analyze user behavior in order to provide the best possible search results. Unfortunately, what works for one query may not work for another, making machine learning extremely difficult to optimize.

Maintaining robust resources that are optimized for search and user experience is the best approach.

Machine learning and automation, in addition to Google’s algorithms, are becoming a strong combo for SEOs, providing real-time information and automating repetitive activities.

This can range from:

  • SEO insights and audits.
  • Content activation and syndication.
  • Internal linking.
  • Reporting.
  • Automated website error detection and quick fixes.

4.   E-A-T

Some people may be startled to learn that the E-A-T idea is not new. In May of 2014, it first appeared in Google Quality Guidelines.

Expertise, Authoritativeness, and Trustworthiness are the three pillars of this concept.

While E-A-T is not an algorithm, it might have an indirect impact on results if you don’t follow best practices like ensuring your site offers expert and authoritative content that visitors trust.

For example:

•             Subject matter content indicating expertise and knowledge.

•             Credibility and authority of your website.

•             Structure, security, and quality of your website.

•             Off-page content by experts.

5. Knowledge Gap, Semantics, and Entities

The Hummingbird upgrade from Google in 2013 was designed to increase search accuracy by better understanding searcher intent.

Semantic search has advanced even further in recent years, and search engines are now better than ever at interpreting query context and word associations.

Semantic search aims to help search engines better comprehend natural language queries.

So, if someone queries Google, “How is it rated?” If they’re standing in front of a French restaurant, Google should be able to figure out that “it” refers to the restaurant, and the searcher is looking for a star rating.

Data and schema that are structured.

org can also help with E-A-T.

You must pay special attention to the knowledge graph while using E-A-T, for example.

The physics of semantic search includes numerous subtle intricacies. In the end, this means that an authoritative website that delves deeply into a single topic will generally rank higher than dozens of sites constructed around several keywords.

This is because a single comprehensive resource provides Google (and, by extension, its users) with all the context it requires to satisfy searcher intent.

Knowledge Graphs allow Google to take structured data about topics and populate its knowledge graph with semantic data.

This allows SEO experts to develop material on issues that may have an impact on the graph and Google’s interpretation of their content.

Here’s ways to create material that’s more semantically optimized:

Choose a big topic that your audience will be interested in. A pet adoption center, for example, may build a page dedicated to various dog breeds.
Ask inquiries to determine the purpose of the searcher. For example, a page on dog breeds may address “various dog breed temperaments” or “easiest dog breeds to train.”

  • Choose a big topic that your audience will be interested in. A pet adoption center, for example, may build a page dedicated to various dog breeds.
  • Ask inquiries to determine the purpose of the searcher. For example, a page on dog breeds may address “various dog breed temperaments” or “easiest dog breeds to train.”
  • Create content that fits searcher intent once you’ve figured out what they want. Make your material as comprehensive and detailed as feasible.
  • Create more landing pages to accommodate various queries that meet the user’s intent.
  • Concentrate on developing “full manuals” and other long-lasting material. Wherever possible, use relevant short- and long-tail keywords.
  • Look for an entity about your company and goods in Google’s Knowledge Graph.
  • Try to provide Google as much information as possible.


Understanding how important SEO ideas serve the end-user is critical to success as Google continues its drive and focuses on the user experience.

The new normal is optimizing content for the user experience and incorporating technology and technical qualities to assist scale your SEO efforts.

The focus of SEO has shifted from stuffing the proper term into a page description to creating more meaningful and better experiences for our visitors through our content, website structure, and performance.

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