How to Update old WordPress posts with Gutenberg Block Editor?

Before we get started, let’s first discuss about the major difference between the old Classic Editor and the new Gutenberg Editor.The Classic Editor was a text editor that looked very similar to Microsoft Word. It had a single editing field with formatting options at the top.On the other hand, the new Gutenberg editor is a fully block-based editor. You’ll add all the content in the form of blocks.

Blocks are content elements which are separate from each other with their own set of formatting options. There’re individual blocks for every piece of content including:

• Paragraph
• Image
• Button
• Gallery
• List
• Table
• Embeds
• WPForms
• Cover, etc
  

The new WordPress Gutenberg editor offers an easy and flexible way of creating content in WordPress.
If you want the full Gutenberg experience, you can completely covert your existing WordPress posts to Gutenberg blocks.You can migrate the content in your post and pages from a single Classic Block to the new block system. Once you’ve clicked “Edit” on a post or page, you can complete the process in just a few additional steps.

1. From the Classic Block menu, click the three dots to view More Options.

2. Next, from the drop-down More Options menu, click the Convert to Blocks option.

3. Review the block conversion (save time with Block Navigation!)

Once I clicked the Convert to Blocks button, WordPress automatically transformed all the content in the single Classic Block like each paragraph into Paragraph Block and every image is in Image Block