Can One Digital Team Make Business Tasks Easier?

A few months ago, I helped a friend start selling handmade gifts online. She had many ideas, but managing the website, social media, and marketing separately became difficult. Her website updates were often delayed, and her posts did not match the products shown online. At first, she tried handling everything herself, but it became tiring and confusing. We decided to make one simple plan for the website, content, branding, and promotion. Once everything followed the same direction, managing the business felt much easier. While reading about a full service digital agency UK, I started thinking about this setup. Do you prefer one team or separate experts?