The performance of a website directly impacts the site's visibility on search engines, affecting the site's ability to attract and retain visitors. That's why it's essential to perform a thorough SEO audit to identify any potential issues that could be hampering your website’s performance.

A Site audit is a process that helps you find problems that could be preventing your site from ranking well on search engines. These problems can range from technical glitches to content-centric problems.

A significant aspect of website performance is loading speed. A sluggish website not only creates a poor user experience but also affects search engine rankings. Through an SEO audit, you can detect reasons for slow website speed and take corrective measures.

Further to this, an SEO audit also points out the quality of content on your website. High-quality, pertinent content is crucial for higher search engine rankings. The audit can uncover if your website contains duplicate content, irrelevant keywords, or poorly optimized meta titles, leading to poor SEO performance.

Aside from that, an SEO audit can help you understand whether your website is correctly optimized for mobile devices. With most of internet users accessing the web via mobile devices, it's essential that your website is optimized for mobile viewing for better user experience and bettered search engine rankings.

Additionally, an SEO audit can disclose any broken links or webpages that are resulting in 404 errors, both of which can badly impact user experience and SEO ranking. The audit is meant to highlight these issues, allowing you to fix them right away and enhance your site’s performance.

Lastly, it’s important to remember that an SEO audit also assists in making an efficient SEO strategy. By knowing what's working and what's not, you will be able to devise a strategy that's customized to your website's unique needs which will boost its performance, increase visibility, and attract more online visitors.

In conclusion, the importance of website performance and a thorough SEO audit can't be underestimated. Remember to conduct regular SEO audits to identify and fix possible issues that could be affecting your site's performance. This proactive approach will keep your website Search Engine optimisation current, user-friendly, and ranking well in search results, thus driving more traffic and ultimately, realizing business growth.