Panda Penalty Pages that have cheap-quality content is more likely to be run by Google Penguin
Links to Bad Neighborhoods Connecting with the “bad zone” like pharmacy or payday loan sites may end up with a bad influence on your search visibility.
Redirects Redirects is the procedure of sending one URL to another URL. If caught in this process, this may not be nice for the site. Because of that, this may be penalized or de-indexed your site
Popups or “Distracting Ads” The official Google Rater Guidelines Document states that the popups and very cheap and irritating ads can be a result of a low-quality site
Interstitial Popups If any site shows a full image of interstitial popups, then Google will be penalized that site
Site Over-Optimization Over-optimization can get your site free from the penalty; then, it may include keyword stuffing and many more keyword decorations
Gibberish Content Gibberish content is helpful for Google to getting rid of produced and auto-generated content
Doorway Pages If your page has another page means if your page redirects users to another page, this is called a doorway page. Google doesn’t like doorway page
Ads above the Fold Sites that have very less content but have many ads above the fold are penalized for this
Hiding Affiliate Links If a site tries too hard to hide its affiliate link. This may result in a penalty
Fred: According to SEO, Fred this update was to target those low-quality content sites that set their revenue first before improving their users
Affiliate Sites IT is so obvious that Google is not such a big fan of affiliate sites. According to some, website which is in an affiliate program are placed under an extra inspection
Auto-generated Content If Google recognizes that your site has auto-generated content, then Google may penalize or de-indexing your site because Google hates auto-generated content
Excess PageRank Sculpting If your site has an excess page ranking sculpting, by no-follow, all outbound links may be a signal of gaming the system. This feature Excess Page Rank Sculpting worked earlier, but it is a dead end now
IP Address Flagged as Spam If your IP is marked as spammed, it will hurt all sites connected to that IP address
Meta Tag Spamming Stuffing keywords in your meta tags to get an endeavor to game the algorithm may result in a penalty from the Google
