SEO Tip
 

There is little value in focusing all of your attention on trying to analyze something that is designed for the purpose of constant, continual and nearly perpetual change. Don't spend hundreds of hours trying to analyze algorithm.

Instead, use your time wisely to create fresh original content that is mildly optimized for those low competition "niche phrases" that are being used by searchers (the ones who know what they are looking for and know how to search.)