How to Annoy Google search engine

The search engines don't take kindly to sites that try to manipulate the search results in their favor.
1 - Throwaway domains
Google specifically warns against throwaway domains in their SEO Webmaster Guidelines.
Many black hat SEO firms will use throwaway domains to build up links to one client's site, only to redirect those same links to a new client's side when they lose the first account.
2 - Doorway pages
A doorway page is built to make one site more relevant for numerous search queries by stuffing it with keywords This page is not part of the site's navigation (meaning no visitor could find it), but it is built into the site structure so the search spiders can crawl it.
3 - Keyword stuffing
Repeating the same keyword a hundred times on one page of content may make it appear more relevant to the search engines,
The SEs aren't looking for a magic number when it comes to keywords. Stuffing your content will only hurt you in the long run.
4 - Duplicate content
Some duplicate content was created on purpose (stealing another site's article and claiming it as your one) some duplicate content is an accident (example.com and exampledefault.com). Either way, duplicate content can get you in a lot of trouble with the search.
5 - Dead links
Nothing is more frustrating for a visitor then running into dead pages all over a site.
The search spiders will also discover these links and flag them
The people behind the search engine algorithms are some of the best in their field. they are constantly updating and tweaking the algorithm to make it better and, in a sense, smarter.
here is some content mistakes that can hurt your SEO.
1 - No call-to-actions
Is no one filling out your contact form or signing up for your company newsletter? Have you tried asking them? Too often site owners worry about creating the perfect lead form,
2 - Too many ads
There is nothing wrong with trying to monetize your site, but please don't stuff it with ads to the point where it looks like one giant classified.
3 - Unfocused content
Step 1: Tell them what you're going to tell them. Step 2: Tell them. Step 3: Tell them what you just told them. This classic approach to public speaking and presentation giving should also apply to your webpage content.
4 - Thin content
On the flipside of unfocused content you also have to be wary of thin content.
5 - Stuffed with keywords
Rule one of content marketing--write for humans first! You never want to write for the search engines because chances are you'll be guilty of over-optimizing your content, which includes keyword stuffing. While it's important to optimize your content and target related keywords, you don't want to overdo it and make your content unpleasant to read.
I've spoken with numerous site owners who don't understand why their competitor (who is employing black hat SEO techniques) is outperforming them in the SERP. I have to keep reminding them that success gained from spamming is short lived. Sooner or later the search engines catch on to what they are doing, and the site will suffer because of it.