If your website hasn't been included in, for example, Google's indexing, you miss out on 80% of all searches per day. With indexing, the search engines send out so-called "bots" or "crawlers" to scan all websites. They copy the content and follow the links connected to the page. In this way, the search engines can collect material about the website's placement and content. Afterwards, they are stored in an index.
Many factors come into play when search engines perform indexing. It is therefore important to have a good internal link structure on your website, so that the search engines' bots quickly and easily get around to all pages. When you launch your website, indexing can take place right after. That's why it's important that the website is completely ready and free of errors when it launches.
Read all about SEO. Everything from technical SEO to link building. Pretty much everything in the dictionary can be referred back to SEO.
Getting a website indexed today is easier than, for example, 10–15 years back. Search engines are so advanced that they find inbound links completely automatically. They essentially show the way to your website. The link, however, must come from a page that Google, Bing or Yahoo already knows.
