Follow that down to the corresponding row to see how effective it is. It looks complex but it s fairly straightforward to use the type of the attack move is along the top row. The huge chart here shows the strengths and weaknesses of each dual type along with the number of pokémon have that type.
pokemon new type weakness chart
pokemon let s go atk type chart
pokemon move type chart
pokemon more clear type chart
pokemon reborn type chart
pokemon poison type chart
pokemon lets go type chart weaknesses
pokemon mega pokemon type chart