The Group Block provides a way of grouping multiple blocks together. This can be handy if you want to add some custom styles to a certain section of blocks within your page, or even if you simply want to add a background colour to a group of multiple blocks.
After adding a Group Block, you're able to add whatever blocks you want, into this block, such as Headings, Paragraphs or Image Blocks,
just to name a few.
Once you've added your content to your block, there are further options available in the Settings Sidebar such as being able to select the background colour for your group of blocks.
When you have multiple blocks nested within each other, selecting the Block that you want can sometimes be a little tricky. For example, selecting the outer most Group Block when you have a Paragraph Block, within a Columns Block, within a Group Block. If you’re finding it difficult to select the correct Block, try selecting the Block that you want, by using the Block Breadcrumbs that appear at the bottom of the page. The Breadcrumbs will appear whenever you have a Block selected, and will list all the parent blocks for the currently selected Block.