Guest blogging for the sole purpose of link building
Guest blogging can be extremely beneficial in terms of building your brand and expanding your reach. However, guest blogging on a relevant or low quality sites for the sole purpose of gaining links is not ok, and could get you in big trouble
Writing short, keyword rich content
Pre-Panda, writing short, content targeting specific keyword could get your ranking. Nowadays, not so much. Using keywords is still beneficial and even necessary, however keyword density should take a backseat to writing excellent content that has a thorough job of covering a topic or theme.
Publishers are always looking for ways to monetise their sites, and perhaps the easiest way to do this is to accept link advertising. Often, a company will ask a publisher if they can buy and space, and then mention they love a text link in a relevant piece of contents. Call it’s advertising. If you want, but when it comes down to it, google considers it a link scheme.
Product review links that pass page rank
Another common practice is accepting free products in exchange for a link on your site. However, according to Google sending someone a free products in exchange for them writing about it and including a link is considered a link scheme. To avoid this black hat technique simply add the rel=”nofollow” attribute to the link to avoid passing on any link juice.
In case you didn’t already get the hint from Reading, sending links that pass pagerank is considerate black hat. The same is obviously true for buying followerd links.
Over optimising internal links
Internal links are important for spreading link equity throughout your site. However, over optimising these links using keyword rich anchor text could get you into trouble. Use natural language that will make sense to your readers rather than focusing on which keywords you want that content to rank for.
Keyword stuffing your alt image tags
Hardly anyone sees what you write in your alt image text, so it’s ok to stuff your keywords there right ? Wrong. While it’s probably want results in any kind of penalty, it will be highly annoying and frustrating to your visually impaired visitors, and likely won’t do anything for your on page SEO anyway.
Link exchanges and buying placements in low quality directories
Google wants to see a natural link profile, links created around the same time just don’t fit this profile. Instead of asking for link exchanges, it’s creating high quality content naturally attracts linked. All links are not created equal. While paying for a no-followed link on high-quality, editorialised directory can be just fine, buying a link on a generic directory that’s obviously more about SEO then user experience could get you into trouble
Using irrelevant keywords just rank
Content marketing requires a steady stream of writing and visual content, and the temptation to find shortcuts can be intense, one way some marketers attempt to do this is by incorporating unrelated or irrelevant keywords into new or existing content, simply to rank for those keywords.
Manual article spinning
There has been a lot written about automated articles spinning, which is obviously black hat. However, manual articles spinning happens all the time, and yet we rarely talk about it. It’s talking existing articles and manually changing up the title, some of the wording and maybe playing around with the format to create a new article
Using hidden text on a site is very bad, but unbelievably, it still happens. The idea is to disguise keywords on a page by matching the text colour to the background colour or positioning text off screen using CSS.
Hardcore comment spamming involves the use of special software to leave links in the comments of various blogs. The idea is that you can generate a large number of backlinks to your site in a short amount of time, potentially increasing your rankings. Fortunately, google is great at identifying and devaluing this types of links