That was a hard title for me to write. Successful web marketing hinges on so many things, it’s nearly impossible to narrow it down to just one MUST have thing.
Think about this: If I asked you to name the one thing needed to make a television advertising campaign successful, what would you say? A great television commercial? Yup, that’s true, but you also need for that commercial to air in the right markets. And not just that, the commercial has to air at the times that your target audience is most likely watching. So you can’t just have the right markets. You can’t just have the right air time. And you can’t just have the right commercial. They all have to go together.
And that’s how web marketing is. You can’t just pick the right keywords, because they have to be optimized. You can’t just get links or run a great social campaign because you’re sending people to a lackluster website. You can’t just do on-page optimization because you need the links to increase authority.