Border Gateway Protocol (BGP) is the routing protocol of the internet. It is used to determine the most efficient way to route data between independently operated networks. BGP hijack attacks are still far less common than distributed denial-of-service (DDoS) attacks. The rerouting makes the attacker a middleman of the network flow meaning he or she can eavesdrop on certain parts of the communication, or alter the traffic. They can also redirect traffic from your customers or users to malicious sites pretending to be part of your network.”]
Source: https://securityintelligence.com/why-you-need-a-bgp-hijack-response-plan/