On-page optimisation refers to the techniques and strategies used to optimise individual web pages in order to rank higher and earn more relevant traffic in search engines. It involves optimising both the content and HTML source code of a webpage.

One of the most important elements of on-page optimisation is keyword research. By researching and identifying the keywords that your target audience is searching for, you can optimise your web pages to include those keywords in a way that is natural and relevant. This includes including keywords in the page title, meta description, header tags, and throughout the content of the page.

Another important aspect of on-page optimisation is creating high-quality, relevant content. This means that the content on your web pages should be informative, engaging and relevant to your target audience. It should also be free from spelling and grammar errors and be easy to read and navigate.

In addition to the content on your web pages, there are also a number of technical elements that can be optimised to improve your search engine rankings. This includes optimising your website's structure and navigation and making sure that your website is mobile-friendly and has a fast loading speed.

Finally, it's also important to make sure that your web pages are easy to share and promote on social media. This can be done by adding social media sharing buttons to your website and by optimising your images and videos to be easily shared across different platforms.

In conclusion, on-page optimisation is a crucial part of SEO, and it involves optimising both the content and HTML source code of a webpage to rank higher and earn more relevant traffic in search engines. By researching keywords, creating high-quality content, optimising your website's structure and navigation, making sure your website is mobile-friendly and has a fast loading speed, and promoting your web pages on social media, you can improve your search engine rankings and drive more relevant traffic to your website.