Search engines use complex mathematical algorithms to guess which websites a user seeks. In this diagram, if each bubble represents a website, programs sometimes called spiders examine which sites link to which other sites, with arrows representing these links. Websites getting more inbound links, or stronger links, are presumed to be more important and what the user is searching for. In this example, since website B is the recipient of numerous inbound links, it ranks more highly in a web search. And the links "carry through", such that website C, even though it only has one inbound link, has an inbound link from a highly popular site (B) while site E does not. Note: Percentages are rounded.
Organic-search traffic is the only search traffic you should be interested in. This is the traffic you get without any direct action on your part. It’s not something you can achieve with ease, though. The statistics say that 83 percent of organic clicks go to the first four results under most categories on search engines. So, to see your site attain that status, lay the foundations well in advance for the traffic you want.
Let’s say, for example, that you run a construction business that helps with home repairs after natural disasters and you want to advertise that service. The official term for the service is “fire restoration,” but keyword research may indicate that customers in your area search instead for “fire repair” or “repair fire damage to house.” By not optimizing for these two keywords, you’ll lose out on a lot of traffic and potential customers, even if “fire restoration” is technically more correct.
ALT tags are HTML elements used to specify alternative text to display when the element they are applied to (such as images) can’t be rendered. ALT tags can have a strong correlation with Google SEO rankings, so when you have images and other elements on your web pages, be sure to always use a descriptive ALT tag with targeted keywords for that page.