It is generally accepted that website owners should aim to update their site's content on a regular basis - ideally, at least once a week. This frequency allows for new content to be picked up and indexed by search engines, and also helps to keep visitors coming back for more. Of course, some businesses may find that they can get away with updating less frequently - especially if their industry isn't particularly fast-paced or dynamic. Ultimately, it's up to the website owner to decide how often they need to update their site's content in order to achieve optimal SEO results.