Robots.txt is not an appropriate or effective way of blocking sensitive or confidential material. It only instructs well-behaved crawlers that the pages are not for them, but it does not prevent your server from delivering those pages to a browser that requests them. One reason is that search engines could still reference the URLs you block (showing just the URL, no title or snippet) if there happen to be links to those URLs somewhere on the Internet (like referrer logs). Also, non-compliant or rogue search engines that don't acknowledge the Robots Exclusion Standard could disobey the instructions of your robots.txt. Finally, a curious user could examine the directories or subdirectories in your robots.txt file and guess the URL of the content that you don't want seen.
Warning: Before anything else first I want to tell you, some dark web links have mind disturbing content, fraudulent, unpleasant content, porn, child porn, Drugs, Weapons, Gadgets buying and selling, and more horrible things. That’s why you are the only one person who is responsible for your all activity; We are not recommending any dark web sites here, If you lose or damaged anything then we are not responsible for these. Here I am adding these links only for education and research purpose.

For example, a plumber could first find a service that has search volume on Google, but may not be talked about that in-depth on their competitor’s websites. In this example, a service like “leak detection” may be listed with a small blurb on your competitor’s sites, but none of them have elaborated on every angle, created FAQs, videos, or images. This represents an opportunity to dominate on that topic.
Description meta tags are important because Google might use them as snippets for your pages. Note that we say "might" because Google may choose to use a relevant section of your page's visible text if it does a good job of matching up with a user's query. Adding description meta tags to each of your pages is always a good practice in case Google cannot find a good selection of text to use in the snippet. The Webmaster Central Blog has informative posts on improving snippets with better description meta tags18 and better snippets for your users19. We also have a handy Help Center article on how to create good titles and snippets20.
Entrepreneurs hoping for strong SEO (search engine optimization) rankings might take a lesson here. They can create a checklist of their own to make sure everything is perfect for their next website article. No, an SEO checklist won't protect you from crashing and burning. But it will help ensure that your post has the best chance it needs to rank high in Google. 
i have never read an informative post until i came across this and am hooked. Helped me recognize broken links that i had no idea where sitting there. Also right in the beginning about having link worthy site, its like you were talking to me about writing see the link "here" and the LSI was a good tip i knew nothing about. Thank you so much and all the best.
Hi Brian, a very useful post, thanks for sharing. These things turned to be very useful for us: blocking thin content/pages from Google index, adjusting meta titles/descriptions and content of popular articles, improving internal links, improving page speed, implementing schema (didn’t notice a big difference here), optimizing images and their alt tags, making sure the site is mobile friendly and there are no accessibility issues (Lighthouse in Google Chrome helped a lot), some link building activity (long term) and of course keyword research and mapping. Thanks again for providing valuable info, regards.
Ensure that the pictures on your website have file names which include the target keyword. Also, your target keyword should be part of your image’s Alt Text. This will improve optimization for your article and also create a clearer picture for the search engines to the relevancy of your article/page. Images are an important component of any website as they make pages visually attractive as well as informative. Optimizing your images should naturally boost your ranking. Also, your image will get a high rank in Google image search.
All sites have a home or "root" page, which is usually the most frequented page on the site and the starting place of navigation for many visitors. Unless your site has only a handful of pages, you should think about how visitors will go from a general page (your root page) to a page containing more specific content. Do you have enough pages around a specific topic area that it would make sense to create a page describing these related pages (for example, root page -> related topic listing -> specific topic)? Do you have hundreds of different products that need to be classified under multiple category and subcategory pages?
Organic results includes a wider range of websites—not just local businesses. While location may still be a factor in the organic results, it is not generally the dominant factor. The main factor is the authority of the website (or the credibility of the site), external links back to the site, the length of time the site has been live, and other considerations. This is why you will often see sites such as Yelp, Angie’s List, and Facebook show up high in search results.