Guest posting is more than just about getting links. It is also about getting exposure for your brand and offering something engaging for the target audience to read. Most website owners and businesses have no clue as how to proceed with, which is where professional blogging services come in the picture.
As the name indicates, blogging services manage the work of guest posting, and these have pretty flexible options, so you can practically rely on them for selecting topics, authority sites, and posting your content. A test order should help in understanding a service better, given that this is a regular online marketing exercise.