A CMS, or Content Management System, is software that lets you create, edit and publish website content through a graphical interface, without writing code. It separates content from design, so editors can manage pages and posts while developers or themes handle the look.
Common examples include WordPress, Squarespace and Shopify. The right choice depends on budget, technical skills and business needs: WordPress offers control and extensibility, hosted builders offer simplicity, and commerce platforms handle online selling out of the box.