These are called 'blurbs'. You can write a brief description about a service or product and then have the entire blurb linked to send them to an interior page or to a store page or wherever you like. Here are some options for how you can use this layout.
You could use these 3 columns to highlight a case study, or a bit of news, or an accomplishment, or a factoid. Lots of options.
You can also use these three columns to share blog post excerpts that will link back automatically to the post page and be pulled in automatically by latest blog. But there is one trick to it and it has to be setup differently. Ask me how.