Clients often ask me the difference and I give them a simple answer that normally puts an end to the conversation and their questions, much like the answer shane thomas gave, but less detailed. Direct is people putting in your url in the top and organic is people searching for you. Here is an example: If I want to buy a book i type in amazon.com (direct traffic) but if i forgot where to buy a book online i search for "where to buy a book online" which directs me to amazon.com (organic traffic). When i explain it like this, a light bulb goes off and they understand. Hope that helps.
Click through rate: Except for high purchase intent searches, users will click on paid search listings at a lower rate than organic search listings. Organic listings have more credibility with search engine users. In one UK study, published by Econsultancy, only 6% of clicks were the result of paid listings. In another study, it was 10%. The important thing to remember is that click through rate varies by purchase intent. Organic rankings will get more click through rates for “top of funnel” keyword search queries.
Now, it’s important to emphasize that the term “organic marketing” doesn’t mean that no money is spent. You’re still going to invest in your marketing strategy and any related software ( Hubspot for inbound, MailChimp for email lists, Buffer for scheduling social media posts, and the like). Rather, organic means you’re not paying to boost the specific post itself.
BrightEdge research supports that a blended approach is best for delivering high performing content. Not only will combining organic and paid search increase website traffic, but it will offer a bigger return on the investment. Take Retail, Technology and Hospitality industries, for example — organic and paid search combined make up more than two-thirds of their total revenue.