This document outlines the key concepts of inbound marketing. It defines inbound marketing as an approach that focuses on attracting customers through relevant and useful content rather than outbound tactics like ads and emails. The document discusses how inbound marketing is based on web 2.0 principles and social media. It also explains the inbound marketing funnel process developed by Hubspot of attracting leads with free content, capturing customer info, engaging with them, converting them and analyzing results. Specific tactics covered include blogging, social media, search engine optimization, email marketing and using tools like webinars and ebooks to attract customers.