III Page Layout
Rows are sections of your Joomla articles. Rows are also containers for columns. Each row can have a fixed, full, or fluid width and can contain from 1 to 12 columns. Rows can have background color or image. There are multiple parameters for each row that we will explain here.
Columns are located inside the rows, divide them vertically, and they are containers for your blocks. Columns can have different widths and vertical alignment. Columns also can have background color or image.
Blocks are the cells of your content. Each block contains a different piece of content for your page. A block can be a paragraph of text. A block can be a heading. A block can be a button or an image. However, a block can also be a Joomla module or custom code.