The short answer
A good backlink is a link from a relevant, genuinely independent site that exists because the content earned it — not because it was bought, traded, or automatically generated. Google’s spam policies define link spam directly as “the practice of creating links to or from a site primarily for the purpose of manipulating search rankings”, and links built primarily to game rankings can actively hurt a site rather than help it.
Relevance and editorial context matter more than raw volume. A handful of links from sites genuinely connected to your industry typically outweighs a large number of low-quality, unrelated links.
Quick-reference table
| Link Type | Counts as Good? | Why |
|---|---|---|
| Editorial link from a relevant industry publication | Yes | Earned because the content genuinely added value; no exchange involved |
| Link from a local business directory or chamber of commerce | Yes, in moderation | Relevant, legitimate, and expected for a real local business |
Paid link with no rel="sponsored" tag |
No | Google explicitly classifies this as link spam if it passes ranking credit |
| Bulk-submitted directory or forum profile links | No | Low relevance, often automated, minimal editorial value |
| Guest post written for genuine audience value, occasional link | Yes | Legitimate if the primary purpose is the content, not the link |
| Link exchange network (“link to me, I’ll link to you”) | No | Explicitly named as a link scheme in Google’s spam policies |
What makes a backlink actually valuable
What it means. A valuable backlink comes from a site with its own relevance and credibility in a topic area related to yours, placed in a context that makes editorial sense — not inserted purely to create a link.
Common causes of backlinks that don’t help:
- ✓ Links from directories or sites with no topical connection to the linking page’s actual subject
- ✓ Links placed in a footer, sidebar, or comment section rather than within relevant content
- ✓ A large batch of links created at once from low-authority or clearly automated sources
- ✓ Links from sites that exist mainly to sell links rather than publish genuine content
What to do:
- ✓ Prioritize relevance over raw link count — a link from a site your actual customers would read matters more than ten unrelated ones
- ✓ Look for opportunities where a link is a natural part of the content, not an artificial insertion
- ✓ Build relationships with sites and publications genuinely connected to your industry or local market
- ✓ Track the quality of new links over time, not just the total count in a backlink report
Tactics that violate Google’s spam policies
What it means. Google’s link spam policy names specific practices as manipulative, regardless of intent — using them puts a site at risk of a ranking penalty, not just a wasted effort.
Common causes of accidentally crossing the line:
- ✓ Paying for a link (or a product, gift, or service in exchange for one) without a
rel="nofollow"orrel="sponsored"tag - ✓ Participating in excessive reciprocal link exchanges set up mainly to trade links rather than build genuine relationships
- ✓ Using automated tools or services that mass-create links to a site
- ✓ Running native advertising or advertorial content where the payment includes links that pass ranking credit
What to do:
- ✓ Google explicitly states buying and selling links is a normal part of web advertising — the requirement is qualifying those links with
rel="nofollow"orrel="sponsored"so they don’t pass ranking credit - ✓ Avoid any link-building offer that guarantees a specific number of links for a flat fee with no mention of relevance or qualification tags
- ✓ Review any existing link-building vendor’s methods against Google’s published spam policy directly, not against a vendor’s own claims
- ✓ Disavow links only as a last resort for clearly manipulative links you can’t get removed, after confirming they’re actually causing harm
When to bring in help. If a site has a large volume of backlinks from unclear or unfamiliar sources — often the result of a past cheap link-building service — a professional link audit is worth doing before pursuing any new links. SDB4U’s link building services start with exactly that kind of review. Call 416-477-3285 for a free consultation.
Building links the sustainable way
What it means. Sustainable link building focuses on being genuinely link-worthy — creating something worth referencing — rather than manufacturing links after the fact.
What to do:
- ✓ Publish original research, data, or genuinely useful resources that other sites in your industry have a real reason to cite
- ✓ Build relationships with local organizations, industry associations, and partners where a link is a natural byproduct of a real connection
- ✓ Contribute genuinely useful guest content to publications your actual audience reads, rather than low-quality sites accepting any submission
- ✓ Earn local links through community involvement, sponsorships, and partnerships that are real, not staged for SEO alone
FAQ
Do I need a large number of backlinks to rank well?
No. Google’s guidance emphasizes relevance and legitimacy over volume — a smaller number of links from genuinely relevant, credible sites tends to outperform a large volume of low-quality ones.
Is it against Google’s policy to pay for a link?
Not inherently. Google’s spam policies state that buying and selling links is a normal part of the web’s advertising economy, as long as paid links are marked with rel="nofollow" or rel="sponsored" so they don’t pass ranking credit.
What’s a link disavow and when should I use one?
A disavow tells Google to ignore specific backlinks when evaluating your site, typically used when manipulative links can’t be removed directly and are believed to be causing harm. It’s a targeted, last-resort tool, not a routine maintenance step.
Are guest posts still a legitimate link-building tactic?
Yes, when the primary purpose is providing genuine value to the publishing site’s audience and the link is a secondary, natural inclusion — not when the guest post exists purely as a vehicle for a link.
How can I tell if a past link-building effort used risky tactics?
Review the actual list of linking domains for relevance and quality — a high volume of unrelated, low-authority, or clearly automated-looking sites is a warning sign worth investigating against Google’s current spam policies.
Building a backlink profile that holds up
Good link building looks unglamorous compared to shortcuts that promise fast results, but it’s the difference between links that hold up over time and links that create risk later. SDB4U’s link building services focus on relevance and legitimacy from the start. Reach out through the contact page or call 416-477-3285 for a free consultation.
Disclaimer
Google is a trademark of Google LLC. SDB4U is not affiliated with, endorsed by, or sponsored by Google LLC. All product names, logos, and brands are property of their respective owners.