The most common form of organic SEM is search engine optimization (SEO). SEO refers to a variety of techniques designed to help your website rank higher in search engine results. Optimizing your website involves doing a little bit of research on what keywords or phrases your customers or potential customers are searching for when they are looking for your products or services online. It then involves writing web content using those keywords in a way that is both easy for search engines to pick up but still readable and pleasant for your website visitors.
Backlinks are basically Authoritative linking. Which means someone else says about your site that it is in an indication of a particular keyword or you have authority in a particular market is indicating that their readers can go and find more helpful information from certain places on the web and they do that by creating these authoritative links which also called backlinks. The more of high quality, authoritative links that you have, Google considers this as you are being incredible in the market. Your website can be authoritative by having other website owners to link to your website, Then Search Engine algorithm will consider your site and you will get higher boost to your SEO and your site will likely get higher ranking and the more of this authoritative link. Blog Commenting is a great way to get backlinks to your website. Step 1. Find relevant and high traffic blog in your niche. Step 2. Actually read the post, what all it’s about. Step 3. Just leave relevant comment to the topic, then simply place your link in the comment.
In 1998, two graduate students at Stanford University, Larry Page and Sergey Brin, developed "Backrub", a search engine that relied on a mathematical algorithm to rate the prominence of web pages. The number calculated by the algorithm, PageRank, is a function of the quantity and strength of inbound links. PageRank estimates the likelihood that a given page will be reached by a web user who randomly surfs the web, and follows links from one page to another. In effect, this means that some links are stronger than others, as a higher PageRank page is more likely to be reached by the random web surfer.