What is SEO?
SEO stands for Search Engine Optimization, and it is a branch of internet site design and programming that is responsible for making web pages in the best possible way so that they can appear in the highest positions of the search engines, when users enter certain words in the search field of the large browsing services (mainly Google, Yahoo and Bing).
Although there are thousands of factors that a search engine relies on to position one page or another, it could be said that there are two basic factors: authority and relevance.
Authority is basically the popularity of a website. The more popular it is, the more valuable the information it contains. This factor is the one that a search engine takes more into account since it is based on the user’s own experience. The more content is shared, the more users found it useful.
Relevance is the relationship a page has to a given search. This is not simply that a page contains a lot of times the search term (in the beginning it was like that) but that a search engine relies on hundreds of on-site factors to determine this.
Why is SEO important?
There are more than three billion sites on the Web, so it is logical to think that the competition is fierce when it comes to appearing in the first places of the queries that are made in Google, for example, since there are practically no niches left without having thousands of sites competing for that same audience. Therefore, sitting and waiting for the visitors to arrive is an illogical attitude. Something must be done to spread our sites on the net, and thus attract more visitors.
The most important reason why SEO is necessary is because it makes your website more useful to both users and search engines. Although they still cannot see a web page like a human does. SEO is necessary to help search engines understand what each page is about and whether or not it is useful to users.
How do search engines work?
The operation of a search engine can be summarized in two steps: crawling and indexing.
A search engine crawls the web crawling with what are called bots. These go through all the pages through the links, go from one link to another and collect data about those web pages that they provide to their servers.
The tracking process begins with a list of web addresses from previous crawls and sites provided by other web pages. Once they access these websites, the bots look for links to other pages to visit them. Bots are especially attracted to new sites and changes to existing webs.
It is the bots themselves that decide which pages to visit, how often and for how long they will crawl that website, which is why it is important to have an optimal loading time and up-to-date content.
Once a bot has crawled a website and collected the necessary information, these pages are indexed. There they are arranged according to their content, their authority and their relevance. In this way, when we make a query to the search engine, it will be much easier to show us the results that are most related to our query.
After the pages are crawled and indexed, the time comes for the algorithm to act: algorithms are the computer processes that decide which pages appear earlier or later in search results. Once the search is done, the algorithms check the indexes. This way they will know which are the most relevant pages taking into account the hundreds of positioning factors. So, that is the ultimate goal of SEO: to be in the first places.