"Blocks" are different pieces* you can use to add content to your site. Each block displays uniquely on the page, and offer a variety of styling options. You will be using blocks to add texts, pictures, videos, and other pieces of content to your pages and posts.
Everything you see outlined in red in the image below is a "block".
An analogy that is used throughout these modules is that blocks are like pieces to a puzzle, where the puzzle is your finished webpage, full of engaging, informative, and aesthetically pleasing blocks.
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