Why would Google not index all submitted pages?

[Leagoldberger]

On Google Search console we see that  many of our submitted pages weren't indexed. What could be the reasons?

| Web pages |
|  130,030  Submitted |
|  87,462  Indexed |

[JordanLowry]

Did you submit a nested xml sitemap? What you could do is segment your sitemaps based on categories then you could see if there are: no index tags, robots.txt blocking a section or maybe those pages are too deep.

For now I would check to see if anything has a no index tag and review your robots.txt file.

Hope that helps some.