Incluso: This word means "even." You use it when something surprising happens.
Example: "She got there late, even though she left early."

Sin embargo: This means "however." You use it to show a different idea from what you just said.
Example: "He studied a lot; however, he didn't pass the test."

Por lo tanto: This means "therefore." It shows what happens as a result of what was said before.
Example: "I didn't have enough time; therefore, I couldn't finish the project."

Learning these words can help you learn new words and make your speaking and writing clearer.