This edge represents the combination of GetChanges and GetChangesAll. The combination of both these privileges grants a principal the ability to perform the DCSync attack.
With both GetChanges and GetChangesAll privileges in BloodHound, you may perform a dcsync attack to get the password hash of an arbitrary principal using mimikatz:
lsadump::dcsync /domain:testlab.local /user:Administrator
You can also perform the more complicated ExtraSids attack to hop domain trusts. For information on this see the blog post by harmj0y in the references tab.
For detailed information on detection of DCSync as well as opsec considerations, see the ADSecurity post in the references section below.