The current update of the website greatly affects the positive perception of it by visitors.
Not all companies have IT specialists - administrators responsible for the site. Transfer of care to an external administrator allows the company's employees to deal with the tasks in which they are most competent, and leave matters of updating the site to people with the appropriate skills and experience.
The cost of care is much lower than employing an additional person in the company. The site taken care of is updated on an ongoing basis, both in terms of content and technical aspects. There are no restrictions, including geographical - in the online world it does not matter where we live and work.