Dielectric paste is for ???

[Myke456@aol.com]

I've been told dielectric paste should be used to:
1)apply metal to metal to improve elect. contact between spark plug tip and
ign wire.
2)apply only to the rubber portion of plug wire boot to keep it from sticking
to the porcelain part of spark plug
3)use on both above

Can anyone definatively clarify its true purpose?

  ([____]=====OOOO=====[____])   87 5kcsTQ, 200k miles
 []]]]]]]][Mike Aiello][[[[[[[]     original owner
___\}}}/________________\}}}/_______myke456@aol.com
       Dutchess County, NY