In the world of friendship, matchmaking, alliances and relationships,  this expression refers to a "good match" and implies that the two persons subjects of the conversation are "made for one another" or "destined for each other" with the connotation of similarity between both personalities and characters of said subjects. Similar to: "A match made in Heaven" when applied to lovers.

Sample Conversation:

Person 1 and 2 are talking about the latest couple in the group.

Person 1: " Man! I never thought there would be anyone as nerdy as Dany!

Person 2: "I never thought Dany would ever have a girlfriend...even less a wife!"