You will notice that the categories on this site range from general (ie: “DigitalWorld”) — featuring all articles, to interest-specific (ie: “Digital Scrapbooking” or “Digital Photography”), and finally targeted to function within the interest (ie: “Digital Scrapbooking Freebies” or “Digital Scrapbooking Tutorials”).

Therefore, subscribing to “DigitalWorld” will notify you of all posts.

Subscribing to “Digital Scrapbooking” will notify you of all posts related to digital scrapbooking only (ie: not digital photography, or Products of Interest, etc.)

Finally, subscribing to a targeted function, like “Digital Scrapbooking Tutorials” will only notify you of posts on that tutorials. If you choose this option, you will only get posts for “Digital Scrapbooking Tutorials” and miss all related “digital scrapbooking” content such as information on freebies, software, printing specials, etc.

Hope that helps!