It can help by lengthening the distance between waves especially in swell where the sea is smooth but rolling. A boat of a certain length will crash in to the next wave at certain speeds in a certain wave frequency, basically the wrong timing.
By adjusting angle you can reduce the frequency of the swell and avoid crashing in to each wave and actually increase speed by getting on to the plane for example.
However if the waves are very large and potentially breaking, going at an angle risks broaching.
In that case you need to square up to it in my view to punch through the lip. There are diagrams in the HMS book showing the boat punching through and out the back of the wave. Just ensure your deck drainers are down and you have your eyes closed!
Only imho, i am no expert.