If a new site is not added to a search engine then does it can find out that page?

If a new site is not added to a search engine then does it can find out that page?

Ideally, search engines should crawl, index and rank your site without you having to submit it to them. It’s just that search engine submission kind of fastens the process.

Nowadays, search engines are too smart..! So, they can crawl your pages without you submit to them..!

Site can be indexed without added in search engine,crawler find your site itself.

If your your website was not added on search engine your website still can be found out by search engine if someone links back to you now when google craws that website which have linked to you. Your website automatically get crawled through that link.

Search engines are too smart now a days, they crawl and index your website even if you will not submit it in search engines.