Search engine optimization (SEO), is the ongoing practice of optimizing a website to help improve its rankings in the search engines. Several internal and external factors are involved which can help improve a site's listing within the search engines. The higher a site ranks within the search engines for a particular keyword, the more traffic they will receive.
SEMRush is primarily a search engine optimization tool, meaning you’d use it as a website owner to help find and target keywords that bring you more search engine traffic. However, as a regular web surfer, you can use it to see what kind of search traffic a site gets How Search Engines Work & Ways to Improve Your Search Results How Search Engines Work & Ways to Improve Your Search Results Tired of searching a bunch of times to find what you want? Here's how search engines actually work and what to do to make your searches faster and more accurate. Read More .
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.