Lead generation, also known as leadgen, is integral to any business. If your company has a sales team, they will likely work very hard to generate leads via referrals, events, and personal connections. What can make it a lot easier, is selling to a 'warm' lead pipeline but the B2B market presents challenges. This is where marketing-led Lead Generation comes in.
In short, marketers aim to speed the process of identifying 'prospects' and 'warm leads' and capturing their data, so that your sales team (which might just be you!) have more and better-quality leads.