Lead generation is the process of attracting and converting strangers and prospects into someone who has indicated interest in your company's product or service. Some examples of lead generators are job applications, blog posts, coupons, live events, and online content.
Whenever someone outside the marketing world asks me what I do, I can't simply say, "I create content for lead generation." It'd be totally lost on them, and I'd get some really confused looks.
So instead, I say, "I work on finding unique ways to attract people to my business. I want to offer them enough goodies to get them naturally interested in my company so they eventually warm up to the brand enough to want to hear from us!"
That usually resonates better, and that's exactly what lead generation is: It's a way of warming up potential customers to your business and getting them on the path to eventually buying.