Search Engine Optimisation commonly known as SEO is one of the most useful parts of digital marketing for businesses that want to increase their visibility on Google. When people need a product service or answer to a question they often search for it on Google. SEO helps a website become more visible in these search results so that potential customers can discover the business. For example if someone searches for a digital marketing agency in their area a business with a properly optimised website has a better opportunity to appear in relevant search results. SEO starts with understanding what people are searching for and using relevant keywords naturally within the website content. These keywords can be included in page titles headings descriptions blog posts and other important areas of a website. But SEO is not only about keywords. Search engines also look at the quality and usefulness of the content. A website should provide clear information that answers the questions visitors are actually asking. Website speed mobile friendliness easy navigation and a good overall user experience are also important because people should be able to access information without difficulty. Creating helpful blog content can support SEO by giving a website more opportunities to appear for different searches. Links from other trusted websites can also help improve the credibility of a website. SEO is different from paid advertising because businesses do not pay Google every time someone clicks on an organic search result. However SEO usually requires time patience and consistent improvement because results may not appear immediately. When done properly SEO can help a business attract people who are already searching for products or services related to what the business offers. This can bring more relevant visitors to a website and create opportunities for enquiries leads and sales. For a business that wants to build long term visibility online SEO can be an important part of a complete digital marketing strategy.