Indexing is the process by which Google adds a web page to its index to show it in search results, meaning that it will be available in its catalog and will appear as a result when a user performs a search.
If your page is not indexed, it will not appear in search results no matter how hard you try.
So once Google knows about the existence of your website and adds it to its index, with all its pages you can say that your page is indexed.
**Please note that this is not a guarantee that you will appear at the top of Google, since this depends on an overall SEO strategy, sales and marketing strategies, among many other things, but it helps you have a more complete strategy to achieve it.
To index it you must select the page and in SEO Attributes add it to each page. Remember that not all pages are recommended to index, such as the terms of use, privacy policies, thank you page, etc.).
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