Glossary
What Is Robots.txt? Definition and Why It Matters
Robots.txt is a set of crawling instructions, not a security tool. It controls crawling, not indexing — a distinction that trips many…
19 Sep 2026
4 min read
Digital PR Blog
Glossary
Plain-English definitions of link building and SEO terms, each linked to a fuller explanation.
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Glossary
What Is Noindex? Definition and Why It Matters
A noindex tag keeps a page out of search results entirely. On a page hosting your placement, that can mean the link…
19 Sep 2026
4 min read
Glossary
What Is an Orphan Page? Definition and Why It Matters
If none of your own pages link to a page, search engines and users alike have little reason to find it or…
19 Sep 2026
4 min read
Glossary
What Is a Redirect Chain? Definition and Why It Matters
Every extra hop in a redirect chain slows users down and makes crawling less efficient. Flattening them is cheap, high-value maintenance.
19 Sep 2026
3 min read
Glossary
What Is a 301 Redirect? Definition and Why It Matters
A 301 is a permanent forwarding address for a URL. Done right, backlinks pointing at the old address keep working for the…
19 Sep 2026
3 min read
Glossary
What Is a Canonical Tag? Definition and Why It Matters
When the same content lives at several URLs, the canonical tag says which one counts — and that's where your link value…
19 Sep 2026
4 min read
Glossary
What Is Crawl Budget? Definition and Why It Matters
Crawl budget only matters for large sites — but for those, wasting it means important pages get crawled late or missed entirely.
19 Sep 2026
4 min read
Glossary
What Is Citation Flow? Definition and Why It Matters
Citation Flow measures link influence by volume. On its own it says little about quality.
19 Sep 2026
3 min read
Glossary
What Is Trust Flow? Definition and Why It Matters
Trust Flow measures how closely a site is linked to trusted seed sites. Read alongside Citation Flow, it can reveal inflated authority.
19 Sep 2026
3 min read
Glossary
What Is Spam Score? Definition and Why It Matters
Spam Score estimates risk from features shared with penalised sites. It's a prompt to look closer, not a verdict.
19 Sep 2026
3 min read
Glossary
What Is a Toxic Backlink? Definition and Why It Matters
Many SEO tools flag 'toxic' backlinks. It's a useful warning label, not a verdict from Google.
19 Sep 2026
3 min read
Glossary
What Is a Link Scheme? Definition and Why It Matters
'Link scheme' is Google's term for link practices designed to manipulate rankings. Knowing the examples keeps you clear of them.
19 Sep 2026
4 min read