Once acquiring your target audience, retaining them through regular communication is key. The most popular way to do this is through triggered messages which is sent individually or through blast messages which are sent in bulk.
Firstly, and most importantly, make sure you’re using the right channels for your audience. Secondly, make sure you’re using the right tools. Lastly, make sure that what you’re posting is worth reading…. If it’s not, don’t bother posting. It’s quality over quantity after all.