@Bubu in this case it means something gets either statically or server side rendered while not all (marked by suspense tags) is resolved. It then on clients ode resolves the rest of the data. So you end up with a mostly loaded page immediately and anything dynamic would get loaded as soon as it is available. If however the data is already available server side it will be sent immediately with the initial request instead. So a dry page gets hydrated :) I hope that makes sense.