High VG eliquid means big clouds. If you like your vape juices with cloud and less of a throat hit, then you should take a look at high vegetable glycerine ejuice. VG is what produces a larger cloud in your vape liquids.
As VG is a very thick substance, it means the eliquid is a little harder to absorb for your vape coils. This means you want to be using them only with sub ohm vape tanks, or big cloud vape kits.
If you suffer from a PG or Propylene Glycol intolerance, than VG heavy eliquids are perfect. We cannot ensure that these liquids have zero PG, as many flavourings are made from PG sources. But these high VG eliquids, will certainly reduce your PG exposure.