Coffee should "outgas" for a few days directly after roasting so that you can enjoy the full aroma. Too fresh after roasting, coffee usually does not yet taste as it could, because there is still too much carbon bound in the beans themselves, which has to be released in the form of CO2. This happens all by itself over time. It is therefore advisable to brew espresso beans for the first time about 10-14 days and filter beans about 7-10 days after the roasting date. With some coffees, it is worth leaving the coffee for a few weeks longer, as the beans change even more over time. Then store it in a cool (but not in the fridge!), airtight container in a dark place and you will be able to enjoy your new (favourite) coffee for a few weeks.