A publisher can be a company or the person in charge of a company that puts out books. An editor is a person who works directly with authors and reports to the publisher. When an organisation is mentioned as the publisher, it just means the publishing company as a whole, which has many editors.
Depending on the context, a publisher can be a single person or a whole company. Most of the time, an individual publisher is the CEO or head of a publishing company. A single publisher is in charge of the company’s big-picture decisions and may be involved in hiring and delegating tasks. This person may or may not be in charge of the day-to-day running of the company, but they always give different people tasks that help with that.
Editors work with authors one-on-one. There may be many different kinds of editors in a publishing company, each with their own areas of expertise. Most of the time, editors choose works that the publisher will approve. From there, the editor will be involved in the ongoing process of publishing. The editor has a more specific job and works directly with authors and texts to make sure they meet the publisher’s standards.
