It is very important to know the main plant movements in biology olympiads. Below you can find quite good notes concerning plant movements provided by http://plantsinaction.science.uq.edu.au.
For visual information, take a look at amazing plant movement videos here.
Here you can find great videos, too.
Image source: https://www.freepik.com/free-vector/diagram-showing-plant-cell_6360210.htm#query=plant%20biology&position=38&from_view=search.