I would say that it definitely depends on the niche that you’re in. If your niche is quite small, then it’s probably easier for you to rank for your mid-tail keywords and you should definitely give it a go! Otherwise, it might be better to start with your long-tail keywords and work your way up to mid-tail keywords and eventually your head keywords. So, I’d say: analyse your competition, see where you stand and establish your game plan! Good luck Naved :)!
QUOTE: “Well, I think you need to look at the pages in an overall way, you should look at the pages and say, actually we see this a lot in the forums for example, people will say “my text is unique, you can copy and paste it and it’s unique to my website.” But that doesn’t make this website page a high quality page. So things like the overall design, how it comes across, how it looks like an authority, this information that is in general to webpage, to website, that’s things that all come together. But also things like comments where webmasters might say “this is user generated content, I’m not responsible for what people are posting on my website,”  John Mueller, Google 2016
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.

QUOTE: “And we do that across the whole website to kind of figure out where we see the quality of this website. And that’s something that could definitely be affecting your website overall in the search results. So if you really work to make sure that these comments are really high quality content, that they bring value, engagement into your pages, then that’s fantastic. That’s something that I think you should definitely make it so that search engines can pick that up on.”  John Mueller, Google 2016
QUOTE: “One of the difficulties of running a great website that focuses on UGC is keeping the overall quality upright. Without some level of policing and evaluating the content, most sites are overrun by spam and low-quality content. This is less of a technical issue than a general quality one, and in my opinion, not something that’s limited to Google’s algorithms. If you want to create a fantastic experience for everyone who visits, if you focus on content created by users, then you generally need to provide some guidance towards what you consider to be important (and sometimes, strict control when it comes to those who abuse your house rules).”
QUOTE: “7.4.3 Automatically ­Generated Main Content Entire websites may be created by designing a basic template from which hundreds or thousands of pages are created, sometimes using content from freely available sources (such as an RSS feed or API). These pages are created with no or very little time, effort, or expertise, and also have no editing or manual curation. Pages and websites made up of auto­generated content with no editing or manual curation, and no original content or value added for users, should be rated Lowest.” Google Search Quality Evaluator Guidelines, 2017
Hi Kai! Using synonyms now and then is a great idea. It definitely makes your copy more natural and pleasant to read. And Google will comprehend that you’re talking about the same topic. You might want to use the keyword you’d like to rank for a bit more often than just once or twice, but don’t fret to use synonyms now and then. We’re not able to detect them with our tool yet, though.

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