Organic traffic is the traffic you get when people follow links from a search engine results page and land on your site. Organic traffic contrasts with referral traffic which comes from links on other sites, and paid traffic, which is traffic resulting from ads. You can boost organic traffic by using content marketing, and by optimizing that content with SEO. Well-optimized content is more likely to get a high search ranking, and attract more clicks and traffic.
Web analytics is the measurement of the behavior of visitors to a website. In a commercial context, it especially refers to the measurement of which aspects of the website work towards the business objectives of Internet marketing initiatives; for example, which landing pages encourage people to make a purchase. Notable vendors of web analytics software and services include Google Analytics, IBM Digital Analytics (formerly Coremetrics) and Adobe Omniture.