Finally, for businesses, legal mentions need to be added, especially for an e-commerce website. This page needs to present the company behind the website, as well as the individual running it and commercial terms in the case of an e-commerce website.
These pages can be produced by the person creating the website, but it’s preferable to have an accountant or a lawyer do it because they are legal documents. Commercial websites have to be reported with the CNIL (in France, if you are in another country, please enquire your local authorities to check what legal documentation you need to provide on your website).
That is it for the legal aspect of things.
Regarding your website and its content, you are also responsible for the communication that is done on it. This is why I always check with my clients the content I create before putting it online. You have to check the content because it is you who is communicating with users. This is why I suggest you hire an editor for writing all the texts on your website. This professional will be the best in optimizing all your texts for referencing, but also for communicating with users.