What is the best practice for description tag if your site has thousands of pages?

brandonsbaseballcards.com/folder1/1089257/x1/0000023a.htm is better than brandonsbaseballcards.com/articles/ten-rarest-baseball-cards.htm because?

What file should you create so that you can provide to bots with more information about the images found on your site?

Does Google always use description meta tags on the search result?

Where are the title tags displayed?

It is best to use single title tag across all of the landing pages.

Which search engine technology prevents a website from appearing in numerous top positions in the search engine result pages?

Implementing a 301 Permanent Redirects on the old pages to redirect to the new pages is a good idea from the SEO perspective.

Which black hat SEO technique is characterized by a method to deceive search engines, by detecting the search engine bot and 'feeding' it with a different HTML code than the HTML actually served to users?

Google gives priority to themed inbound links.

What is the main reason for the effectiveness of optimizing a webpage towards a long tail keyword search?