SEO is done on an ongoing basis, meaning customers will pay for a package that includes monthly work, rather than just a single operation. Monthly activities vary based on the SEO requirements your business has.
For example, it could be updating the blog, posting new content, optimizing new content and building more backlinks. Search engines prefer websites with such regular activity, rather than websites with nothing fresh over long periods of time.
It indicates that the business is active and able to evolve for its customers. Rankings must be assessed regularly, not to mention updating techniques based on others’ work.