When an N:1 relationship is created between A and B, it signifies that multiple records of A can be associated with a single record of B. Like 1:N, creating an N:1 relationship will create a lookup attribute in A and a navigation link in B.
When an N:1 relationship is created between A and B, it signifies that multiple records of A can be associated with a single record of B. Like 1:N, creating an N:1 relationship will create a lookup attribute in A and a navigation link in B.