On-page SEO: A practical guide to optimising your website

On-page SEO is the practice of improving the content and elements on a web page so that search engines can understand it and people can find it useful. It includes everything from the page title and headings to the quality of the content, internal links and image descriptions.

Good on-page optimisation is not about repeating a keyword as often as possible. It is about creating a clear, helpful page that matches what someone is looking for, then making that page easy to understand and navigate.

Understand what the searcher wants

Before writing or updating a page, consider the reason someone would search for the topic. They may be looking for an explanation, comparing options, seeking a specific service or ready to make a purchase. This is known as search intent.

Review the pages currently appearing for your target search and look for common themes. Are they guides, product pages, comparisons or local listings? Use this research to decide what format and level of detail would best serve your audience. The aim is not to copy competing pages, but to provide a more useful and relevant answer.

Choose a clear focus for each page

Each page should have a clear subject and purpose. Choose a primary search phrase that accurately reflects the topic, along with related terms people may naturally use. These can help you understand the language and questions associated with the subject.

Avoid forcing keywords into sentences where they do not belong. Search engines can interpret context, while readers are more likely to trust writing that sounds natural and answers their questions directly.

Write a descriptive page title

The HTML title element helps describe a page to search engines and often appears as the clickable headline in search results. Write a unique, concise title that explains what the page offers and, where appropriate, includes its main topic.

For example, a guide about caring for indoor plants might use a title such as How to Care for Indoor Plants: A Beginner’s Guide. Avoid vague titles, repeated titles across multiple pages and long lists of keywords. Search engines may display a different title in results if they consider another page heading or text more suitable.

Create a useful meta description

A meta description is a short summary that may appear beneath a page title in search results. It does not directly determine rankings, but a clear, relevant description can help searchers decide whether to visit your page.

Summarise what the page covers, use straightforward language and make sure the description accurately reflects the content. Treat it as a helpful invitation rather than an advert packed with claims.

Structure content with headings

Headings make a page easier to scan and help organise its main ideas. Use one clear main heading, usually an H1, followed by logically ordered subheadings such as H2 and H3.

Write headings that describe the section beneath them. They can include relevant phrases where natural, but should first and foremost help readers understand the page. Do not choose heading levels simply to change the size or appearance of text; use styling for that purpose.

Make the content genuinely helpful

Useful content answers the reader’s question clearly and provides enough detail to help them take the next step. Depending on the topic, this may mean offering instructions, examples, comparisons, original research or practical advice.

• Put the main answer near the beginning of the page.
• Use plain language and explain specialist terms.
• Break up long passages with descriptive subheadings and lists.
• Check facts, spelling, links and dates where accuracy matters.
• Update older pages when information changes.

There is no ideal word count for every page. Focus on covering the subject appropriately rather than adding text solely to make a page longer.

Use clear, readable URLs

A concise URL can give both visitors and search engines a clue about a page’s subject. Use words that describe the content, separate them with hyphens and avoid unnecessary numbers or parameters where possible.

For example, example.co.uk/guides/on-page-seo is easier to interpret than a long address containing unclear codes. If you change an established URL, set up a suitable redirect so visitors and search engines can reach the new page.

Add relevant internal links

Internal links connect pages on your website. They help visitors discover related information and help search engines understand how your content fits together.

Link to useful, relevant pages using descriptive anchor text—the visible words in a link. For instance, read our guide to writing product descriptions is more informative than click here. Check links regularly to ensure they still work and lead to the intended destination.

Optimise images and other media

Images can make a page more engaging and easier to understand, but they should be relevant to the content. Use appropriately sized image files to help pages load efficiently, and choose file names that describe the image where practical.

Add alternative text (alt text) when an image conveys useful information. Describe what matters in the context of the page, rather than filling the text with keywords. Decorative images can usually have empty alt text so that assistive technologies can skip them.

Consider the mobile experience and page performance

Pages should be easy to use on a range of screen sizes. Check that text is readable, menus are usable, buttons are easy to tap and important content is not hidden or difficult to reach.

Page performance also matters to visitors. Compress large images, limit unnecessary scripts and review performance using tools such as Google PageSpeed Insights. Treat performance recommendations as opportunities to improve the experience, rather than as a substitute for useful content.

Use structured data where it is appropriate

Structured data is additional code that can help search engines interpret specific information on a page. Depending on the content, this could include details about a product, an organisation, an event or a recipe.

Only add structured data that accurately reflects visible page content and follows the relevant search engine guidelines. Correct markup does not guarantee enhanced search results, but misleading or inaccurate markup can cause problems.

Measure and improve your pages

On-page SEO is an ongoing process. Use tools such as Google Search Console and web analytics to see which searches bring people to your pages, how visitors interact with them and whether important pages are being indexed.

Look for pages that receive impressions but few clicks, pages that have lost traffic or topics where visitors may need more information. Make changes thoughtfully and allow time to assess their impact. Search results can change for many reasons, so avoid drawing conclusions from a short-term fluctuation alone.

On-page SEO checklist

• The page has a clear purpose and matches the likely search intent.
• The title and main heading accurately describe the content.
• The content is original, useful and easy to read.
• Subheadings organise the information logically.
• The URL is clear and descriptive.
• Relevant internal links help visitors explore related pages.
• Images are suitable, appropriately sized and accessible.
• The page works well on mobile devices and loads efficiently.
• Any structured data is accurate and relevant.
• The page is checked and updated when necessary.

Final thoughts

Effective on-page SEO brings together relevance, clarity and a good user experience. Start by understanding what visitors need, create a page that meets that need and make its information easy to navigate. Small, considered improvements across your site can make your content more accessible to both people and search engines.