Which describes the first step a crawler-based search engine uses to find information? Stored web addresses related to search terms are found and displayed.
Pages are ranked by a mathematical formula called an algorithm.
Text and keywords are selected and recorded in huge data centers.
Robots called “spiders” read a web page and follow links to other pages.

the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)