In these later days more and more online businesses decide to use cdn tools. One of the main factors that influence on this process is the way how searching engines form their rankings. For example, among other things Google uses indicators for performance and page load time to determine the place of specific website in rankings. Other searching engines use similar mechanisms to form their rankings. Content delivery (distribution) networks allow every customer to improve such indicators as website’s performance, page load time, quality of streaming and other. Searching engines is not the only reason why online businesses use content distribution systems. The other very important thing nowadays is the website’s convenience for mobile devices. Due to the idea of mobile devices, they often have lower speed of the internet connection compared with the desktop computers. In other words, they depend on speed more than home computers. Accordingly, cdn performance makes websites more mobile-friendly (independently from presence or absence of a mobile version for an interface).