SEOModule 6: Authority, local search and measurementLesson 13 of 18
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17 min lesson · Updated August 2026

What are backlinks and digital authority?

A backlink is a link from another website; useful earned links can support discovery, context and reputation, while manipulative link schemes create risk.

What you will learn

By the end, you will understand:

  • Explain backlinks without relying on tool scores
  • Distinguish earning links from link manipulation
  • Understand how digital PR can create genuine references

Visual explainer

See the idea clearly.

Links connect the web

A backlink—also called an inbound link—is a hyperlink on another site that points to your site. Search engines can use links to discover URLs and understand relationships. Google’s ranking systems have historically used links among many signals, but not every link has the same meaning or value.

A relevant editorial link inside a careful article is different from a hidden footer link sold across thousands of unrelated sites. Context, source, placement, purpose and the linked page all matter. Counting links without evaluating them can produce bad decisions.

Authority is a useful idea, not one official score

People use “authority” to describe the accumulated reputation, references and trust connected with a site, organization, author or subject. Google does not provide a public website-authority score.

Metrics such as Domain Authority, Domain Rating and Authority Score are created by third-party SEO tools using their own link indexes and formulas. They can support comparison within the same tool, but they are estimates—not Google ranking factors or proof of quality.

Why people choose to link

People link when a destination improves their own explanation. Useful reasons include original research, a clear definition, a tool, public data, a detailed tutorial, a strong visual, a primary announcement, an expert contribution or a genuinely relevant product or organization.

The most sustainable question is not “How do we place a backlink?” but “What can we create or contribute that another publisher would responsibly reference?” Promotion still matters because useful material cannot earn attention if nobody knows it exists.

Digital PR earns attention through real stories

Digital public relations connects a useful story, resource or expert with journalists, creators, communities and publishers. It may involve original research, transparent data, commentary on a relevant event, a public-interest tool or a distinctive business story.

Coverage is not guaranteed, and a mention may not include a followed link. The work can still create awareness and reputation. Do not measure digital PR only by link count; consider relevance, accuracy, reach, referral visits, brand searches and relationships.

  1. 01

    Identify a relevant audience question

  2. 02

    Create verifiable original value

  3. 03

    Find appropriate publishers

  4. 04

    Pitch the value honestly

  5. 05

    Earn coverage or feedback

  6. 06

    Measure mentions, links and useful outcomes

Paid, sponsored and user-generated links need honest treatment

Buying advertising or sponsoring content is not automatically wrong. The problem is buying links to manipulate search rankings or hiding the commercial relationship. Google asks paid links to use `rel="sponsored"` and accepts `nofollow` where appropriate. User-generated links can use `rel="ugc"`.

These attributes describe the relationship. They do not make misleading promotions acceptable. Advertising and endorsements must also follow applicable disclosure and consumer rules.

Link schemes and spam

Risky practices include buying followed links for ranking, large reciprocal-link exchanges, automated link creation, low-quality guest posts produced only for anchors, private networks, sitewide widget links and irrelevant directory submissions.

Google may ignore manipulative links or apply spam actions. A sudden drop in a tool score does not prove a penalty. Use Search Console manual-actions and security reports, traffic evidence and the actual link sources before reaching conclusions.

Review backlinks with context

  • Is the linking page real, accessible and relevant?
  • Does the link help its reader?
  • Is the anchor wording natural and accurate?
  • Was money, a product or another benefit exchanged?
  • Is the relationship disclosed and marked appropriately?
  • Does the destination provide the value being referenced?
  • Would the mention still be worthwhile if search engines ignored the link?

Real-world example

Example: a recruitment salary report

Example

A recruitment company publishes anonymized salary ranges with methodology, sample limits and a downloadable chart. Industry publications reference the data when discussing hiring trends. The links are earned because the source adds evidence. A purchased article on an unrelated coupon site with “best recruitment agency” anchor text would not provide the same value.

Try this

Find a linkable reason

Choose one page you wish people would reference. Write the exact reason a journalist, customer or educator would link to it. If the answer is only “because we want SEO,” identify what evidence, tool, example or explanation is missing.

Common questions

Questions beginners ask.

Are backlinks still important?

Google continues to use link analysis within its systems, but links are one part of search quality and relevance. Manipulative links may be ignored or create risk.

How many backlinks does a site need?

There is no universal number. A few strong relevant references may matter more than thousands of unrelated links.

What is domain authority?

A third-party estimate created by an SEO-tool provider. It is not a Google metric.

Should every business submit to directories?

Use legitimate directories or associations that help customers or establish accurate local/business information. Avoid mass irrelevant submissions.

Are reciprocal links bad?

Natural mutual links can be useful. Large exchanges created primarily to manipulate ranking can violate spam policies.

What is a nofollow link?

A link marked with `rel="nofollow"`, indicating the publisher does not want to imply a normal endorsement relationship. Google treats link attributes as hints for ranking purposes.

Should I disavow every suspicious link?

Usually not. Google says most sites do not need the disavow tool; it is intended for significant artificial-link situations with action risk. Use it carefully.

Assessment

Check what you understood.

5 questions · instant explanations

1. What is a backlink?
2. Which statement about Domain Authority is accurate?
3. Which link is most likely to have genuine editorial value?
4. A brand pays for an article containing a link. What is responsible?
5. True or false: every link opportunity is worthwhile if it increases a tool score.

Sources

Primary references.