Seeing it is having belief in it. Judging colour is the first step in wine tasting. The darker it is the older it usually is. The colour can be judged better against a white background; by holding the wine glass at an angle to see the colour. Colour also gives you the clue about the grape variety and whether it has aged in wood.
Thus, the art of wine tasting can be simplified into the 'five S' viz. See, Swirl, Sniff, Sip and Savour. In this period you will learn about the clarity, character, integration, expressiveness, complexity and connectedness. Beyond terroir and grape variety there's matching food to the wine and even the glasses to be used to have it. Wouldn't you know and gift people who would love to know much more?