Akamai is a CDN provider, I know because I work in tech and my company uses it for our hosting as do thousands of others. Anyone who is hosting a website or web app is likely using a CDN.
A CDN in extremely simplified layman terms, stores the parts of websites in multiple areas geographically. A perfect analogy is to think of it like an auto parts retailer having warehouses in multiple states of a country instead of just one state. When a customer makes an order, they ship from the closest warehouse. It's literally a "Content Delivery Network" or a network of servers that Akamai maintains that hold content to deliver to the closest user that requests them.
When you visit a website, just loading the website could result in dozens of requests going out to a CDN to load the images, the Javascript files and ads hosted in iframes too. When you request anything on the web, with or without a browser, it has to go to a web server to handle that request. For its customers Akamai handles serving up the content from the closest CDN for any given request made to a web server for content hosted on the CDN.
If CDNs didn't exist, you'd either do that splitting up of content across multiple areas yourself as a server host, or your server would be serving up resources from one location in the world to users from potentially any location in the world. That's a crappy experience for your users. If my server was only hosted in the UK and most of my visitors are making requests from across the pond.
It's normal and it's a good thing that most traffic goes to a CDN, otherwise things would be much slower.