Definition
The process of attracting and capturing potential customers' contact information so sales can pursue them. Channels include SEO, paid ads, content, referrals, and inbound calls. Generating a lead only means someone raised a hand; turning that into work is a separate job handled further down the funnel.
What it looks like in practice
New customers reach a pest control operator from a few places: a Google Business Profile that shows up for 'wasp nest removal near me', a page on his site about termite inspections, and referrals from a couple of realtors. Each source needs a capture point. The map listing needs a phone that gets answered, the termite page needs a short form, and realtor referrals land as texts on his cell. Knowing which source produced a given call is what tells him whether the termite page is worth updating or whether he should be buying lunch for more realtors.
Why it matters
Lead generation is where marketing spend turns into actual sales conversations, which is why owners feel it in revenue faster than any other marketing activity. A business can do excellent work and still starve if not enough of the right people are asking about it. The discipline is matching channel to customer: paying for leads with no real intent burns budget faster than almost anything else a small business does. It's also only half the job: generation without a system for scoring and working what comes in just creates a bigger pile of unanswered inquiries, which is worse than a small pile answered fast.