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Hi Samuel, In general, URLs should not contain any unnecessary folders (delimiters). In your first example, the /b/ is not needed since you've already got a /blog/ folder. In the second example, that page appears to be main site content, you don't need any additional folders unless they're specifying a general topic under which you'll be adding more specific pages. You're also burying your keywords a one step further into the URL than is needed. Google says they don't put too much weight on URL structure, but in my experiences, well planned and logical URL structures perform better. It's not going to have a huge impact on your rankings, but it will help to some degree.