When answering this question, you can compare the advantages and disadvantages of online and offline advertising. Online advertising is often seen as more effective nowadays because it can reach a larger audience quickly, is more targeted, and allows for easier tracking of results. On the other hand, offline advertising, like billboards or flyers, can be more memorable in certain situations and may reach people who aren’t always online. You can also mention that the effectiveness depends on the product, target audience, and goals of the campaign. Giving examples can help make your answer clearer.