That's not what marketing does. It doesn't influence the decision. Marketing makes sure your company is top of mind when the customer decides to make a decision.
Not just that. An effect of advertising I only understood later in life is that they give the company name recognition among all your peers.
E.g. BMW doesn't create car commercials just to get everyone to think about BMW when buying cars. They make car commercials to make sure everyone knows that BMW is expensive and good, so that driving a BMW is a signal that you're wealthy.
Similarly, Salesforce might want to make it clear that if you go with them, it's a "defensible" choice that you can easily explain to your boss.
E.g. BMW doesn't create car commercials just to get everyone to think about BMW when buying cars. They make car commercials to make sure everyone knows that BMW is expensive and good, so that driving a BMW is a signal that you're wealthy.
Similarly, Salesforce might want to make it clear that if you go with them, it's a "defensible" choice that you can easily explain to your boss.