The issue is already addressed in previous thread, https://www.seoforum.com/thread/my-blogging-website-pages-not-indexing-on-google for the same site.

Thankyou for sharing your opinion.

In Google Search Console there is a section of Removals. All unwanted URLs can be removed from the Google's cache. After this, apply for review by making them fixed in GS...

Thank you for your answer @binayjha ! The problem that I'm facing ATM is that those attachment pages don't exist anymore in my back end (can't see them in wp-admin at all...

Comments backlinks are important as they generate traffic to the website though most of them are no-follow links. But it still has importance.

It is imperative to invest in seo. You have to get the knowledge yourself or outsource it to an external company. Without it, there will be no satisfactory results.

Always the most important and best backlinks are the ones that generate ruh to your website. Such links will always work.

Few steps need to be taken, Check whether those images are getting called on any page of the website, then remove those. By default WordPress create pages for each image...

The website requires attention for both on-page SEO and off-page SEO to achieve the traffic goal. The website still has to win the trust of Google for the keywords. It is...

Hi there. Which tool are you using to check traffic? Sometimes they take time to refresh data or show it. Also check your bounce time and try to reduce it