An SEO audit is a method of assessing the strengths and weaknesses of your website by looking at its technical and content architecture.
It determines whether any improvements can execute to make your website more search engine friendly.
It's also a great way to identify issues that could lead to a Google penalty, which can damage your website's ranking very quickly.
An SEO audit can include
Optimizing image and text content
Creating a sitemap
Implementing other best practices to improve indexing
Audits are a critical part of the SEO process because they can help to ensure that your efforts are practical and that your website is following best practices.