Unpacking the Puzzle of 'Accrual of Income' vs 'Receipt of Income'

Bros/sisters, let's break down tax theory for the CLAT UG exam. I get confused between these two concepts myself. Accrual of income is when you earn it, but not necessarily when you receive it. For example, if you're a freelancer and you completed a project in Jan '23, your income is considered earned as on 31 Dec '22, even if the client pays you in March. On the other hand, receipt of income refers to when the actual cash or payment is received in your account. So, in the above case, the income is considered earned on 31 Dec '22 (accrual), but it's only received in March (receipt). Can someone please explain the difference between these two concepts in simple terms?