What does akamai do?

Answer 1

Akamai is a company that has developed a global array of interconnected servers that cache content supplied by its internet customers. This way the content is physically much closer to the Internet user who wants to access it. Big companies purchase Akamai's service to speed up the upload time of their pages.

Akamai makes uses of a specialized DNS servers and high caching webservers to lower latency for end users.