Why website cacheroot?

Why cacheroot website to the level of whole html pages?
Well, I imagine, the attendance of 100 people per minute, even though I hardly imagine that the majority of sites.
So, even one page, in rukozhopyh coders doing well, for example, 20-30 queries to the database. Is the resource consumption of real-time, outweigh the cost of maintaining the cache and change tracking? It is a relic of past years or really working scheme? Again, it's not about over the highly visited sites, although those would have issues.
April 19th 20 at 12:49
2 answers
April 19th 20 at 12:51
Is done for immediate response and for search engine optimization
How caching helps in search engine optimization? - isaiah.Schimmel commented on April 19th 20 at 12:54
@isaiah.Schimmel, a lot of indicators for which search engines evaluate sites. Including response time, content serving and its contents. - Kristina_Lind commented on April 19th 20 at 12:57
@isaiah.Schimmel, well logically the same. The cache => faster page load => Google evaluates better. - veda.Cartwright71 commented on April 19th 20 at 13:00
April 19th 20 at 12:53
1. In order to speed up the page load time. In WordPress, for example, I remember from the box is 45 queries to the database about. After installing the plugin from caching the page load speed is 2-3 times faster.
2. To save on servers. If the server is not very good, and the money for good power there.
3. To optimize high-load applications - but is used there object caching.

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