Welcome to the Q&A Forum

Ok, a understand better. I have the same problem with a Site un Drupal, I think is better use a robot.txt to block the empty pages.

These because the link juice that the page transfere is minimum and use extra resources from the server.

If you can't block with robots.txt the noindex,follow meta es ok. But if you see in Analytics that some Landing Pages are www.example.com/product/ {} random_text_here es better use a 404 with redirect 301 to Site Map for user experience.

Hi, mmm, I not really sure that understand why you have invalid pages, options:

• Products without stock
• Is build based in other database

If you have a product name without content is better a meta noindex, follow because transferred link juice.

But like I say I dont know why these products exist. If you have more info I could help more

If you know that a Page doesn't have content I recomend:

1. A page without content have to response 404.
2. If the Page return a 404 make a 301 to Site map.
3. In the Site Map use meta noindex, follow to transfer the link juice.
4. Eventually you need clean these pages because is bad for users and SEO.

Regards

Hi Steven, the answer is relative to the size of the Site. For example, if you publish 10-15 articles by day is probably a good idea crawl the category pages because if just use Home Page a lot of articles will lost.

Other tip is use a diferent Title and description for category, try do not repeat the category and tag.