You have seen website ads begging for your attention, some are useful while some appear non-relevant and bizarre with the webpage design. Ads are the biggest source of income for website owners. Despite being a fuel for online existence of websites, ads hugely contribute in slowing down the website loading speed.
You came across websites that load partially and then stop responding, this happens when the ad server becomes unresponsive, or bottlenecked.
Website loading time depends on the number of HTTP connections and the data downloaded from a web server to user’s browser. Greater the number of HTTP connections, slower the website loads. The same equation is with the size of data transferred.
With ads hanging on the website we are loading data by creating more HTTP Connection to web server(s) which results in slow website loading speed. Here is an image showing how loading of yourRavi.com slows down due to Google ads,