MAJOR ROUTES OF ADMINISTRATION
Routes of administration for weed are now more varied than ever. You can buy flower, sure, but you can also buy oils, extracts, edibles, topicals, and even 99-percent pure, crystallized THC. They all have various benefits and drawbacks, but the most noticeable difference is the amount of remnant terpenes (volatile chemicals that give bud, and other plants, their distinctive smells: current research indicates they may be what give indica and sativa strains their differing effects).
Yes, THC is what gets you high, but the terpenes seem to be what make it up or down, lazy or creative, and so forth. The more pure the extraction process, the fewer noncannabinoid substances (like terpenes) that will be left, and the less unique the character of the “high” will be.