A well-maintained site gives visitors confidence and increases the reputation and conversion rate of your business (the chance to sell), while an outdated, cumbersome site with outdated content, dead pages or errors, creates the impression of lack of professionalism.
If you want to present your business in the most favorable manner and get an impression of a well-developed site, then the maintenance of your site is essential.
In addition to the appearance of the site and how well it moves, there is another reason why you should have a maintenance contract: SEO (optimization for Google)
In short, Google analyzes your site with the help of robots that gather information about the value of your site. The better a site is developed and maintained, the higher it will be in Google and the more traffic it will have.