Over the years, businesses have used many tools for lead management, like the rolodex, contact management software and spreadsheets. But these tools function like a system of record. Sales reps just view their leads using these tools; they don’t get context. And that’s where CRM software (customer relationship management software) fills the void. In a CRM, every lead gets their own profile. This profile contains demographic details, a chronological list of every conversation the lead has had with your business, along with all the data/documents you’ve ever shared with them. And all this is just one part of what CRM software can do.
If your small business wants more customer conversions (i.e. sales), then learning when and how to use autoresponders is a step in the right direction. These pre-scheduled emails, usually one or more in a series, are triggered by customer behavior and can be used to target, engage and convert prospects to buyers. An individual autoresponder can even become a standalone product by itself.
What's the difference between them? One-off communications versus prolonged, email-based interactions. For example, email marketing tools are excellent for one-off communications. You can use these tools for the one time you'd like to send someone an automated email response when they join a subscriber list, on their birthday, or when you promote a new product. But marketing automation tools are better suited for prolonged, email-based interactions. For example, you can use marketing automation tools whenever you want to guide someone from a subscriber list to a product purchase. Or you can send thank you emails or send new product promotions—all without having to lift a finger after the workflow is designed.
Over time, the popularity of email marketing campaigns resulted in personal email inboxes that were overflowing with the latest and greatest offers. Email campaigns grew and people grew tired of them. Laws that allowed customers to unsubscribe breathed new life into email marketing campaigns as customers could easily pick and choose the companies they were interested in. 
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