In a move that I’m about 93% certain will be copied by other carriers, Ryanair will now charge passengers for checking their bags. At the same time, Ryanair fares will be reduced by about $4.50, or the same amount that it costs to check a bag in online. Passengers who don’t check in the bags online will be charged about $8. Those checking in online also will benefit from priority boarding. The carrier has also upped the baggage limit to 30kg.
In short, if you use the website, this will only benefit you.