Quick answer: A complete on-page SEO checklist covers seven areas before you hit publish: the title tag, URL, headings, first 100 words, internal links, image alt text, and meta description. Miss more than one or two of these and search engines have a harder time understanding what the page is about — which means it shows up less often for the searches it should win. Run through the list below on every post, not just the ones you think matter.
Key takeaways
- On-page SEO refers to everything you control directly on the page — title, headings, content, links, images — as opposed to off-page factors like backlinks.
- Google's own documentation states that title tags and headings help it understand page content and relevance, so both need the target keyword near the front.
- Posts under roughly 300 words often get flagged as "thin content" by SEO audit tools, though Google has never published a hard minimum word count.
- A blog that skips internal linking loses one of the cheapest ranking signals available — pages that link to each other help search engines see the whole site as an authority on a topic.
What does "on-page SEO" actually mean?
On-page SEO is every ranking factor you control by editing the page itself — as opposed to off-page SEO, which covers things that happen elsewhere, like other sites linking to yours. Title tags, headings, URL structure, internal links, image alt text, and the words in your content are all on-page. Backlinks, social shares, and brand mentions are off-page.
The distinction matters because most small business owners spend money chasing off-page tactics (backlinks, PR, social ads) while their own blog posts are missing basics that cost nothing to fix. Google's Search Central documentation lists title elements, heading tags, and descriptive URLs among the signals it uses to understand what a page is about — none of which require a marketing budget, just attention before you publish.
Here's the quick-reference version. Print this, pin it, or paste it into your content workflow.
| Element | What to check | Why it matters |
|---|---|---|
| Title tag | Keyword near the front, under ~60 characters | Google truncates long titles in search results |
| URL slug | Short, readable, includes keyword | Cleaner URLs are easier to share and index |
| H1 | One per page, matches search intent | Tells both readers and crawlers the topic instantly |
| First 100 words | States the answer or main point directly | Answer engines and skimmers both read the top first |
| Subheadings (H2/H3) | Break up every 200–300 words, some phrased as questions | Improves scannability and matches how people search |
| Internal links | 2–4 links to related pages on your own site | Spreads authority and keeps visitors on your site longer |
| Image alt text | Describes the image, includes keyword only if natural | Required for accessibility, also indexed by Google Images |
| Meta description | 1–2 sentences, includes keyword, under ~155 characters | Doesn't directly boost rankings but affects click-through |
The pre-publish checklist
Run this before every post goes live, not just the ones you're proud of. Bad habits compound — the posts you rush are usually the ones that never get read anyway.
- Confirm the target keyword appears in the title, the first paragraph, and at least one subheading.
- Write a title under 60 characters so it doesn't get cut off in search results.
- Check that the URL slug is short and readable — strip out stop words like "a," "the," and "of" where you can.
- Add 2 to 4 internal links to other pages or posts on your own site, using descriptive anchor text instead of "click here."
- Add at least one outbound link to a credible external source if you cite a stat, rule, or fact.
- Write unique alt text for every image — describe what's actually in the picture, don't just repeat the keyword.
- Draft a meta description that summarizes the post's answer in one or two sentences.
- Read the first two sentences out loud — if they don't answer the reader's question, rewrite them.
- Scan for paragraphs longer than four lines and break them up.
- Confirm there's at least one list or table if the content includes three or more parallel items.
Don't skip this: if your first paragraph doesn't answer the reader's question, nothing else on the checklist can save the post. Google's Search Central guidance repeatedly emphasizes helpful, people-first content over keyword placement — a well-optimized page that doesn't actually answer the query will still underperform.
How long should a blog post actually be for SEO?
There's no official minimum, but most posts that rank well for a specific question land somewhere between 800 and 1,800 words. Google has never published a word count requirement — length is a byproduct of thoroughness, not a ranking factor on its own. A 400-word post that fully answers a narrow question can outrank a padded 2,000-word post that doesn't.
That said, some patterns are consistent enough to plan around:
- Quick-answer posts (how much does X cost, what's the deadline for Y) tend to run 600–1,000 words because the answer is short and doesn't need much supporting detail.
- Resource or comparison posts (checklists, "best tools for," side-by-side guides) usually run 1,200–2,000 words because they cover multiple sub-questions in one place.
- How-to posts with steps vary widely depending on how many steps there are — don't pad a 5-step process to hit a word count.
If you're trying to figure out how often you should even be publishing to see results, that's a separate question from length — we covered the publishing-frequency side of this in How Often Should a Small Business Blog Post?
What are the most common on-page SEO mistakes?
The most common mistake is writing the title and meta description as an afterthought instead of a first step. Both get written last, rushed, and stuffed with keywords instead of written to make a human want to click. Here are the others worth watching for:
- Keyword stuffing in headings. Repeating the exact keyword in every H2 reads awkwardly and doesn't help rankings — vary the phrasing naturally.
- Orphan pages. A post with zero internal links pointing to it is invisible to both readers browsing your site and to crawlers mapping your site's structure.
- Duplicate title tags. If two posts share a title, search engines can't tell which one to show for a given query — check this especially on sites that publish frequently.
- Missing alt text. Beyond the accessibility issue, images without alt text are invisible to Google Images, which is a real traffic source for many small business sites.
- Burying the answer. Three paragraphs of background before the actual answer is a habit left over from print writing — online readers and AI answer engines both want the answer first.
If you're publishing daily or close to it, these mistakes multiply fast because there's less time per post to catch them. That's part of why structure matters more, not less, at higher volume — we go deeper on that in How to Structure Your Small Business Blog for SEO When You're Publishing Daily.
Does on-page SEO matter for local businesses specifically?
Yes — local SEO adds a layer on top of standard on-page SEO, and skipping it is one of the most common gaps for small business blogs. Beyond the checklist above, a local business post should also:
- Mention the city, region, or service area naturally in the content — not stuffed into the title, but present somewhere a reader would expect it.
- Link to the business's location or contact page from relevant posts.
- Use location-specific examples instead of generic ones when illustrating a point.
- Match schema markup (structured data) to the business type where the platform supports it, so search engines can associate the content with the right location.
None of this replaces the fundamentals — a locally-focused post with a broken title tag still underperforms. It's an addition, not a substitute. For a deeper look at building that local authority through content without a dedicated marketing team, see How to Use Content Marketing to Build Local SEO Authority Without a Large Team.
Where AI-written content fits into this checklist
None of the seven checklist items above require a human writer to execute correctly — they're structural, and that's exactly why they're easy to systematize. The risk with AI-generated content has never been the AI part; it's publishing generic, unedited drafts that skip the checklist entirely. Google's own guidance on AI content states plainly that it doesn't penalize content for how it was produced — it evaluates whether the content is genuinely helpful, which is a separate question from authorship.
That's the gap Segeo is built to close: every post it publishes runs through the same on-page structure — keyword-aligned titles, real internal links, alt text, working headings — automatically, instead of hoping a busy team remembers the checklist on a Friday afternoon. We've written more on why the quality bar is about substance, not the writing tool, in AI Content Won't Get You Penalized. Bad Content Will.
If your current posts are missing most of the items on this checklist, that's often a symptom of a bigger structural problem rather than a one-off oversight — worth a full look with 5 Signs Your Website Needs an SEO Overhaul.
Want a fresh, checklist-compliant post landing on your site every day without doing this manually? Segeo publishes daily AI blog content with the on-page basics built in — title, headings, internal links, alt text — so nothing on this list gets skipped on a busy week.
