Magnolia 5.3 reached end of life on June 30, 2017. This branch is no longer supported, see End-of-life policy.
ComponentA component is the smallest block of content that editors can edit, delete and move as a single unit. Think of a component as content that "belongs together". When you look at a typical Magnolia page, you can identify components easily with that rule of thumb. At its simplest, a component is just a heading and some text that go together.