Pages are not indexed properly in Google

Good points, @MRHMAMUN, @bradly.spicer and @crescendo — using Webmaster Tools (now Google Search Console) is the correct direction. The old public "Submit URL" form is not the recommended workflow anymore; use the URL Inspection tool for single pages and sitemaps for bulk discovery, and expect requests to be queued (indexing is not guaranteed). Ask Google to recrawl your website. (developers.google.com)

A short, up-to-date troubleshooting workflow:

• Use the site: operator and cache: operator to quickly see what Google shows for the domain and a specific page.
• Inspect the URL in Search Console and review the Index Coverage (Coverage) report to get exact exclusion reasons and crawl errors. How to use Search Console. (developers.google.com)
• Verify robots controls, meta robots tags, and any X-Robots-Tag headers; a noindex or a disallow in robots.txt will prevent indexing or prevent Google from seeing page-level rules. Block indexing with noindex / X-Robots-Tag. (developers.google.com)
• Check canonical tags, HTTP status codes (4xx/5xx), whether pages require login, and whether content is thin or duplicated. Improve content and internal linking, update your sitemap, then request reindexing only after fixes. Crawling & indexing best practices. (developers.google.com)

These steps reflect current Search Central guidance and will surface the most common technical and quality reasons pages are not indexed.