But to be indexed, in fact, not as easy as we imagine. There are many competitors out there, that have the same purpose, be in top 10 search result. Some of the requirements that we need to be indexed are having many backlink and good keyword. If both requirements are combine with good web optimization, it is not possible to be in top 10 SERP [Search Engine Results Page].
We could use web directory to make our site standing in the search engine. There are two categories of web directory; free web directory and paid web directory. For cost effective, free web directory is enough. Of course, there are limitations like one website one category, need to put their link to our website and others. But over all, it's OK using free services.
Submitting websites to web directories can increase backlinks to our site. Submit to many web directories means get many backlinks. Use good keyword when you fill the form submission out, in the field description and keyword. It can help our websites to be indexed by search engine. Of course, do not forget to keep keyword in the websites too.