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.
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.