In simple terms, lobbyists represent you and your interests, helping you advance topics that are important to you within the government. Although there are some important differences, hiring a lobbyist is something like hiring a distributor or sales rep that specializes in the federal government market.
In fact, most lobbyists don’t call themselves lobbyists (at least not publicly) – lobbying firms are usually officially called “government relations” firms, and lobbyists often have titles such as “government relations specialist” or “vice president of government relations.”
I broke information about lobbyists into a few sections. Please click on the links to see the information you’re interested in.