Aggregator offers its own block called RSS Aggregator Display, which can be used on any page or post throughout your WordPress site. Here’s how to add and configure it.
Adding the Block
To insert the block:
- Open the block selector by typing a slash
/on a new line. - Start typing
RSS Aggregator. - Select the
RSS Aggregator Displayblock from the dropdown and add it to your page or post.

Once added, the block options will appear in the right-hand sidebar. If you do not see the sidebar:
- Click within the block itself, or
- Click the sidebar (cogwheel) icon at the top right of your screen to open it.

Selecting a Display
When using the block, you are embedding an Aggregator Display. As explained here, displays are a combination of sources, layouts, and design customizations which you can manage directly within Aggregator’s settings.
As such, the main action you have to take after adding a block to your page or post is to select a Display, as shown below.

Block Customization Options
The Aggregator block also offers an alignment setting as shown below. Using this option, you can set how to align the block display in the content area and whether it should be full width on your page or post.

Advanced
In this section of the sidebar, you are able to apply a custom CSS class (or more than one) to just this block. This is a great way for developers familiar with CSS to add custom styling changes just for this single block.