A table is basically a grid made up of columns and rows. Each little box is called a cell. Your text, pictures, whatever goes inside the cells. To create a table you need to start and end it. What goes between the start and end table depends on what type of table you want.
Every table has at least one row.
A table row is one horizontal row made up of x number of table data cells. It is completely up to you what you put into each cell, it can be text, images, links, anything. If you want to create a table with two columns and one row. You can have any number of table rows and data cells as long as you remember to end each tag. If you want to add an extra cell or row make sure you end the one before it before starting a new one.