SEO audit is a standard procedure which gives the website owner an idea about the overall performance of the website and individual pages,traffic of the website. Audit also gives you an insight of how website is performing and what needs to be done for the ranking.
SEO audit need to be done before starting the project and once the half part of the project is completed. This will give the insight in to how well the website is performing and key areas to be targeted for the optimization.
SEO Auditor need to perform the technical analysis, on-page analysis,off-page analysis and competitive analysis and keyword research.Audit also gives the error report which is need to fixed for the perfect optimization of the website.