After creating a Content Block, we can add it to your Email Campaign.
In your Email Campaign, you can add the Content Block by typing it in as "{{> [name of block'}}"
In this example, we're creating a Content Block called Name that will insert the First Name and Last Name from your list in your Email Campaign.
In your Email Campaign, add a Text Widget and type in the Content Block in the text widget.
In our example, we're adding our Content Block Name by typing "Hi {{> [Name]}},"
After sending out the Email Campaign, this populates the beginning of the email with Hi followed by their first and last name (Fig 1).
Fig 1

After sending our your Email Campaign, the Content Block in this example will by populated by the recipient's first and last name, which is taken from their list (Fig 2)
Fig 2

Inserting the Content Block with the Basic Editor
In the Basic Editor, you can type in the Content Block with the same "{{> [name of block'}}" formatting (Fig 6).
Fig 6

When receiving emails sent from campaigns using Content Blocks from the Basic Editor, the result is the same as when doing so from the DND Editor (Fig 7).
Fig 7

To learn more about Content Blocks, click on the corresponding link below:
Adding Content Blocks in the Basic Editor