Wildcard, you should use a wildcard certificate. Here is more details, https://www.digicert.com/faq/public-trust-and-certificates/what-is-a-wildcard-certificate

Developer can fix this issue of URLs. By the way, follow Google's instruction and make the domain.com/ as frontend or homepage URL. Rest is duplicate to this URL.

Create high-quality backlinks for free by guest posting on reputable sites, engaging in relevant forums, utilizing social media, and networking within your industry. Focu...

Dealing with backlinks can be a tricky task. Backlinks from a university website can have both positive and negative impacts, depending on the quality and relevance of th...

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Backlinks play a crucial role in enhancing SEO by serving as indicators of a website's authority and credibility. Search engines perceive backlinks as a vote of confidenc...

Do-follow links pass SEO value and influence search rankings, while no-follow links signal search engines not to follow or give SEO credit. Balancing both helps maintain...

Please let me know how do you find these updates by Google...

You are not all alone. Go through this, https://www.quora.com/Does-Adsterra-destroy-a-site-s-rank-in-Google