Connect to your site manager and Add a new page from the page editor of the Pages add-on. Within the page creation editor, click on the Add a block button to add a first row then click it again in order to create the second block. On each block, click Add a column, until you have three columns in your block.
It's time to add three images, one to each column of the first block.
The second block is where you will insert your text. This allows you to insert your pictures and text so that the formatting is automatically aligned and ventilated.