Step 1: Open the article link on your blog.

Step 2: Scroll down and locate the Edit button just after the article's title.

Step 3: Click on the "Dropdown" icon from the editor header for more options and select the "Article Settings" option.

Step 4: Navigate to the "Add to a series" section in the sidebar and select the series you want to publish the article to from the dropdown.

Step 5: Click on the "Update" button to save your changes.

Your article will now be part of the series. Here's an example of what a Series looks like on Hashnode blogs.