Hello,
You should specialise in getting results for your clients. What are their problems that they are coming to you with?
Digital Marketing Services is something that clients understand now and it covers many topics that from blogging to SEO as you know.
What are their goals? Who are their buyers? If they have a B2B product or service then Instagram will not make sense. Focus on the client, their buyer persona, their issues, their sales results and tailor a plan to resolve each problem step by step as it lines up in a complete Digital Marketing Strategy.
Let me know if this helps or if you have any more questions.
Thank you
Clodagh