#Technical SEO
Technical SEO is the part of search engine optimization that addresses how search engines crawl, index, and render a website. It covers site speed, mobile responsiveness, schema markup, canonical tags, sitemaps, robots.txt, and the underlying site architecture.
Why it matters
A site can have great content and strong backlinks and still underperform in search if technical issues prevent search engines from crawling or rendering it correctly. Common issues include slow page load (especially on mobile), missing or broken schema markup, indexation problems, broken canonical tags, duplicate content, and orphaned pages. Technical SEO is foundational and is not a one-time fix but an ongoing health check.
Related: Crawling, Search Index, Core Web Vitals, XML Sitemap
#On-Page SEO
On-page SEO is the optimization of individual web pages to rank higher in search results. It covers title tags, meta descriptions, headings, body content, internal links, and the way each page answers a specific search query.
Why it matters
On-page SEO is where intent meets keyword. Each page should target a specific search query and answer that query better than the competing results. The title tag and H1 establish the topic; the body content develops it; headings (H2, H3) structure it; internal links connect it to related pages. Modern on-page SEO also requires content that demonstrates expertise, experience, authority, and trust (Google’s E-E-A-T framework).
Related: Title Tag, Header Tags, Meta Description, Internal Link
#Domain Rating (Authority)
Domain Rating, or DR, is a 0-to-100 score from Ahrefs that estimates the strength of a website’s backlink profile relative to all other sites on the web. Other tools use similar scores (Moz Domain Authority, Semrush Authority Score).
Why it matters
A higher DR generally correlates with better SEO performance, because authoritative sites rank more easily. DR is calculated from the number and quality of backlinks pointing to the site. It is a relative score, not an absolute one. A DR 30 site is competitive in a low-competition niche and underweight in a competitive one. DR is one input among many; topical relevance, content quality, and on-page execution all matter.
#Alt Text
Alt text is a short written description of an image, added in the image’s HTML. Screen readers read it aloud for visitors who can’t see the image, and search engines use it to understand what the image shows.
Why it matters
Good alt text describes the image plainly. It’s an accessibility requirement first, and stuffing it with keywords helps nobody.
#Anchor Text
Anchor text is the clickable words in a link.
Why it matters
Search engines read it as a clue to what the linked page is about. Keyword-stuffed anchors used to work and now look manipulative, so a natural mix of brand names, page titles, and plain descriptions is safer.
#Duplicate Content
Duplicate content is the same, or nearly the same, text appearing at more than one URL, on one site or across several.
Why it matters
Google doesn’t usually penalize it. It picks one version to show and filters out the rest, and that may not be the version you wanted. Common causes include http and https (or www and non-www) versions both loading, tracking parameters, and copied manufacturer descriptions. Canonical tags and redirects fix most of it.
Related: Canonical Tag, Thin Content, Scraped Content
#Thin Content
Thin content is a page that gives visitors little or nothing of value: a few sentences, copied text, or a doorway page that exists only to rank.
Why it matters
A site with a lot of it can see its stronger pages held back too. That’s one reason content pruning exists.
#User-Generated Content (UGC)
User-generated content is anything visitors create instead of the site owner: reviews, comments, forum posts, photos, and questions.
Why it matters
For local businesses, reviews are the big one. On a website, links inside comments and forum posts should carry rel=“ugc.”
#Content Pruning
Content pruning is removing, merging, or improving a site’s weakest pages so the site as a whole gets stronger.
Why it matters
It isn’t deleting for the sake of it. A page with backlinks or steady traffic usually gets improved or redirected, not dropped. Our content pruning guide walks through the decisions.