For those of you new to term Inbound Marketing it means to 'pull in' and 'attract' your target audience, it is permission based marketing.
Examples of Inbound Marketing are:
The opposite is Outbound Marketing, which means to 'interrupt' and 'push' marketing messages to your audience, these are often poorly targeted and irrelevant, resulting in expensive marketing with a poor ROI.
Examples of Outbound Marketing are:
Source: Hubspot's 120 Awesome Marketing Stats, Charts and Graphs
Marketing Takeaway: Business owners who are serious about growing their business need to invest in Inbound Marketing.