Letter L

LangChain - Python/JS framework for building agents and LLM call chains with tools.

Last Click is an attribution model in which all the credit for a conversion is given to the last channel before a purchase.

Lead magnet is a free benefit (checklist, guide, calculation) in exchange for a contact. Converts anonymous traffic into top-of-funnel leads.

Lead Nurturing is the systematic “warming up” of cold leads through a series of useful touches until they are ready to buy.

Lead Scoring is a numerical system for assessing the “hotness” of a lead based on behavior and demographics, allowing sales to focus on those who will buy.

Lead-gen is the process of attracting targeted leads through advertising, forms, and bots. The first stage of the sales funnel.

LlamaIndex is a framework for RAG: indexing documents, searching for relevant fragments and transferring them to LLM.

LLM (Large Language Model) is a large language model such as Claude, GPT, Gemini. AI Marketing Framework 2026.

Look-alike is an algorithmically found audience similar to your existing clients. The strongest tool in VK Ads, Ya.Direct.

LTV (Lifetime Value) is the total revenue from one client for the entire time. Main metric for subscriptions, e-com with repeat purchases, b2b.

LTV/CAC is a key indicator of business health: the ratio of customer value to the cost of attracting him. Normal >3, catastrophe <1.