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Google introduced its Pagespeed Insights tool in 2011 to provide a measurement and recommended improvements to slow loading pages. According to surveys, more than 45% of people expect a web page to load in less than 2 seconds, and 40% leave a web page if it takes more than 3 seconds to load. So it becomes really important for every webmaster to reduce their site's loading time. Google thinks site speed is most important and has embedded in its ranking algorithm as one of the major factors.
You can start checking your page speed insight by typing in the domain name that you would like to get an overview of and hit the submit button. If your page speed score is less than 50 which means poor if it is greater than 50 and lesser than 75 which means above average, but anything above 80 shows a good sign of webpage speed.
Website optimization is the only way to increase your page speed and score. Following are some of the works that can be done to optimize the page speed:-