diff --git a/strategies/base.py b/strategies/base.py
index 18dfa87..e2646e5 100644
--- a/strategies/base.py
+++ b/strategies/base.py
@@ -5,4 +5,11 @@
 class TransactionStrategy(ABC):
     @abstractmethod
     def create_transactions(self, exp: Expense, myshare: ExpenseUser, data: list[str]) -> list:
+        """
+        Create transactions for the given expense and user's share of the expense.
+
+        :param exp: Expense to create transactions from
+        :param myshare: ExpenseUser object representing the user's share in the expense
+        :param data: List of strings containing additional data for the transaction
+        """
         pass
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