Whether you should hire an external agency depends primarily on your organizational structure. In many cases, it can be very advisable to get an external view and hand over services in the area of content creation to an agency.
There are three key reasons why a content creation agency is worthwhile.
Know-how and experience. Unless your core business happens to deal exclusively with content creation, your in-house knowledge of these topics is probably limited. A content creation agency brings experience and know-how that is of great value to you. That's why it's especially advisable to enlist external help from a content marketing agency when it comes to strategy development and professional content implementation.
Full focus. Developing and implementing a content marketing strategy is not a sideline task. If you don't have sufficient capacity internally for strategy development and implementation, then a content marketing agency is a must. Because content creation requires not only know-how and experience, but also a full focus on your topic.
Fresh wind. In addition to the advantage that an agency can take a lot of work off your hands, it is also able to look at your project from the outside. This is because operational blindness is an important issue when it comes to style and strategy. If you've been with a company for a long time, you don't have an outside perspective on strategy and the impact of content marketing efforts. For the realignment of your content creation strategy, it can therefore be useful to consult an external partner. Because an agency sees your company from a completely different perspective than you do.