@Ajay Kumar Hi Ajay, Great question β this is something every email copywriter wrestles with early on, so let me break it down clearly. Your core deliverable as an email copywriter is the writing itself: sequences, subject lines, CTAs, and overall messaging strategy. That's the skill clients are primarily hiring you for, and it's the right thing to focus on mastering first. That said, you do need working knowledge (not mastery) of a few supporting areas, so you can speak confidently and collaborate effectively with clients: Performance metrics β understanding what open rates and click-through rates indicate, and how to use them to refine your copy. You don't need to calculate or track these yourself. Sequence architecture β knowing how a sequence flows (welcome β nurture β pitch β follow-up) so your writing fits the bigger strategy. Deliverability fundamentals β basics like avoiding spam-trigger language and understanding why domain warm-up matters. This is rarely something you'll manage directly. What you generally don't need to learn right now: Technical campaign setup inside an ESP (Klaviyo, Mailchimp, etc.) β this is typically handled by the client or their team, though you can offer it later as a premium add-on service. Advanced deliverability management β that's a specialized skill set on its own. My advice: build your copywriting skills first, and absorb the technical context gradually as you work, not before you start taking clients. When you land your first one, simply ask: "Do you already have your email platform set up, or would you like help with that as well?" Their answer will tell you exactly what's expected of you. Hope that helps clarify things!