Inscription was just added to the game two days ago, but many people have it at 350+ already. Understandably, there are a lot of questions. In this post I will attempt to answer some of them. This post is aimed at people who are scribes, or are interested in becoming scribes. If you're just interested in how to use glyphs to enhance your skills, but not in making them, you may want to look into the glyph FAQ.
So what's this Inscription all about, then? Inscription is a new primary profession to make glyphs (permanent enhancements to spells), mostly. Scribes can also make scrolls, and for themselves, shoulder enchants and caster-oriented offhands.
What goes into making a glyph? Herbs, primarily. Lots of herbs. You mill them into pigments, turn the pigments into ink, and put the ink down on parchment to make glyphs.
What's the difference between a major and a minor glyph? Major glyphs make big changes to spells, minor glyphs make small ones. We have slots for both; you can't put a major glyph in a minor glyph slot, nor vice-versa. At level 70, we have two major slots, and three minor. At level 80, we'll have three of each.