Does the page URL show in search engine results?

Question

I'm particularly interested in Google search results. Some websites use category identifiers in their URLs, while others use the more advanced "friendly URLs" method. I.e:

Old URLs: mywebsite.com/23151/32/

New URLs: mywebsite.com/my-category/my-page

If a new method is used, does the page rank increase? (provided that everything else remains unchanged).

Let's say I have a website that has a decent page rank, but I want to increase it. It has a lot of pages, and it uses the old URL style. Should I change the design of the URL to a new friendly style for SEO reasons?

PS When I say page rank, I mean page ranking in search results, not Google PageRank.

Answer 1

If you look at the Beginner's Guide to Search Engine Optimization related to this post: Google SEO Beginner's Guide

You will see a section that says something in the lines

Creating descriptive categories and file names for your documents a website will not only help you keep your site better organized, but it can also lead to better crawling of your documents using search engines.

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Answer 2

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Answer 3

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If you ask if you should implement them, my answer will be yes, but only if it is for a new site or if you are absolutely sure that you know what you are doing and know how to reassign old URLs to new ones via .htaccess, etc. d. Changing all your URLs without giving the bots a map to help them explore the new structure is likely to actually hurt your ranking.