According to the Solution Design Reference (SDR) eVar6 is designated to capture the category at the time each product was viewed.
The SRD shows a code example for the use of eVar6:
Which configuration setting must be set for eVar to properly record its values?
A . Enable sub relations for products and eVar6.
B . Set the allocation to origin, and expiration to purchase.
C . Set Conversion Variable Syntax, and choose the binding event.
D . Enable merchandising, and use product syntax.
Answer: C