Digital Marketers focuses on their clients growth so that they can grow. Similarly, their clients must definitely focus on how their customers would benefit, what they sell and make an effort to get rid of anything that might trouble their customer to ensure the conversion of leads through their sales team.
Even if you entrust your marketing with a digital marketer and they get you good leads, you need to be aware that a point will come where the customer would judge you for what they receive and how they receive it. So even though you appoint a marketing team and invest heavily in marketing, you need to look at your products and services and customer care in an unbiased manner to rule out any probable challenges in conversion. That will help you in deriving benefits out of the leads that you get through marketing.