With your five card heart suit open 1H, partner responds 1S raise their spades to 2S showing your 4-4 fit in spades (you have a 5-3 fit in hearts also)
Acol Bidding
With your five card heart suit open 1H, partner responds 1S raise their spades to 4S showing your 4-4 fit in spades (with a 5-3 fit in hearts also) and game going points
Plan Before You Play
Draw all the trumps - run the hearts, discard losing diamonds or clubs in dummy on your low hearts,
The Play
Draw all the trumps unfortunately a 4-1 trump split meaning you must play all your trumps to draw out the oppositions holding and risk losing control of the side suits - run the hearts being sure to play the AH in dummy before returning to declarer's hand to run the rest of the low hearts, discard low diamonds on the low hearts, lead out diamonds
Comment
This hand can make 12 tricks if you never lead out the club suit waiting for the opposition instead to help you get 3 winners in clubs.
The above commentary is intended as a guideline only. As with any Bridge hand there are many ways to bid and play any hand.