Gaining Google's trust doesn't happen overnight. It takes time. Think about building up your relationship with anyone. The longer you know that person, the more likely that trust will solidify. So, the reasoning is, that if Google just met you, it's going to have a hard time trusting you. If you want Google to trust you, you have to get other people that Google already trusts, to vouch for you. This is also known as link-building.
Marketing requires creativity. That creativity can come in many forms. Graphic designers put together visual presentations to attract customers. Writers create content that is designed to engage the reader and keep them interested. A programmer writes code to create a web page that is easy to navigate. Regardless of your marketing role, you need to think creatively.