The head is the foam that rests on top of the beer after it has been served. Retention is how long the head lasts in your glass. The head exhibits aroma attributes of the beer that are not found after the head has died down, so it is for this reason, as well as aesthetic and stylistic reasons, that a beer with a good long-lasting head is desirable.
What does ‘Pitching’ mean?
‘Pitching’ is simply the brewer’s term for adding yeast to the fermenter when brewing beer.
Originally published in our Craft Beer Club's Micro Brew News, River Horse Brewing Company edition.