After 3 years my website with 1338 URLs in the sitemap still shows 1232 pages "Crawled - currently not indexed" in Search Console. Is this normal?
Solution 1:
After much trial and error I have found the answer to my question. Most of the urls in my sitemap had four query parameters. When I reduced this to one query parameter, immediately Google started indexing my site. 4 weeks after the change, 88% of the urls in my sitemap have been indexed. I expect this percentage to increase further in the weeks ahead.