"Be brief" provides the best advice I can offer for your digital media writing. To demonstrate, I'll keep this post to 100 words.

In digital media your readers are not readers, they are skimmers.  People viewing your digital media writing will be more easily drawn in by short phrases and bullets points, not long passages of copy.  Be conscious of the key words and phrases used throughout your writing, providing both guidance to the reader and a boost to your SEM. This post contains 100 words.  Although it could have been more detailed, it made the point.