Deindexed – (aka Banned) Google will remove a website from its index and search results if the sites does not meet Google’s quality guidelines. Here’s 17 Common Reasons for getting De-Indexed. Google explains it here.
Penalized – A Google penalty will typically result in a demotion of a website’s search engine ranking positions (SERP). This may be due to an update of Google’s search algorithms or the result of a manual review, detecting black-hat SEO techniques. Read this recovery guide if you need to rebound from a manual link penalty.
Sandboxed – It is commonly believed that two important factors cause this filter to come into play; the age of a domain, and the competitiveness of the website niche.