The advantage of AX

I heard that AX will help reduce BOM. I dont know how to reduce it. Can you explain it because someone ask me these question but I dont know about it.

No system will “reduce” a BOM it is in the design. I am assuming by this you mean the number of lines or construction, so you are moving from a flat BOM file to a hierarchical structure. Ultimately it depends on the system and the meaning. When you are asked to explain how to reduce a BOM ask them to define the statement.