Please vote : 1. domain.com/post_name.html 2. domain.com/category/post_name.html 3. domain.com/category/subcategory/post_name.html 4. domain.com/post_name 5. domain.com/category/post_name 6. domain.com/category/subcategory/post_name 7. domain.com/index.php?post_name 8. domain.com/post?=1 What is the best URL structur for SEO ? Give me reason please ...
came to the conclusion, that top-clean urls like your exmaple 1 to 3 are sure the most prefered by the bots. but as long as there is no session-id in xy.php?id=1212 these are now indexed well these days too, as long as the domain is valued as high value content
www.domain.com/category/post-name/ This is called proper internal link structuring, your pointing to category specific sections with relevant releant content in that tier of the URL structue.