How does sea floor spreading relate to super continents

The seafloor spreading is a process that occurs at the divergent plate boundaries. What this process does is basically pilling up new crust at the divergent boundary, created from the magma that cools off, and pushes the old crust further away from it. As the old crust is pushed away, it results in movements of the continental plates. As they are moving, eventually they come to a situation to collide with one another. As they collide, they practically merge, creating one larger continental mass from the previously existent two, as that continues, more and more continental plates will merge, with the end result being a single enormous continental mass, a supercontinent composed of all the previously existent continental masses.