Once you think about social network u see a graph : people in the nodes and relations as arcs.... But in general - it describes personal relation between people...
Lets think step forward !
Meaning,
If in any datastore i hold Person datatype, And i add to it social relations,
for example by calculation of calls from person to person , i can know how strong its friendship.... = relationship
And if i know it - i can predict that both of them will want same thing to buy.
They will go to same places to rest..
They will buy the same things .....
As u can see obn the attached pictures , the person has 3 friends,
But the relation with friend B
is much stronger than with C.
Meaning , we can expect that they share same hobbies.
and buy the same things....
Think about it .
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