A Brief About Google Panda Update

Launched in February 2011, Google Panda Update aimed at rewarding high-quality websites and thereby downgrade the low-quality websites in Google’s organic search engine results. It was formerly termed as “Farmer.”
Google reported Panda’s roll-out has impacted nearly 12% of English language search results.
(https://www.forbes.com/sites/johnrampton/2016/11/29/everything-you-need-to-know-about-panda-4-0/#bfb7d5b33e9e)

Major Phenomenons Panda Update Targets:

Duplicate Content– Copied content that pops up on the internet in several places. Duplicate content may also appear on your website when you possess multiple pages featuring similar text with petite or almost no variation.

Thin Content– Not so strong pages with little relevant or substantive text and resources, like a set of pages determining numerous health conditions with few statements available on each page.

Poor Content– Pages that offer little value to human readers as they may not possess in-depth information.

Less trustworthiness– Content usually generated by sources that are not regarded as decisive or substantial. Besides, there are other parameters as well that Panda update covers.

How Can You Heal from Panda:

When the SEO industry is taken into consideration, Panda has often been deemed as an update from which it’s tough to recover. While there are always options available.
Relinquishing content framing practices
Checking website content for quality, usefulness, relevance, and authority
Make certain that given page content is relevant to a user’s search query.
Eliminating or overhauling duplicate content
Make use of Robots no-index, no-follow command in order to block the indexing of duplicate internal website content or other similar issues
(https://moz.com/learn/seo/google-panda)

A piece of advice: Publishers are advised to concentrate more on delivering the best probable user experience on their websites and avoid thinking about Google’s present ranking algorithms or signals.
Hopefully, few publishers did a fix on the Panda algorithm update, however, Panda was one of 500 search enhancements.
As a matter of fact, after the launch of Panda, Google rolled out a dozen of tweaks to its ranking algorithms and few sites inappropriately considered that changes or modifications in their rankings were associated with Panda.
Google further suggested that poor content on certain pages of a website may affect the entire site’s rankings.
Hence, eliminating poor content pages, merging, or even enhancing the content of individual shallow pages into more competent pages may help your high-quality content rank.

(https://webmasters.googleblog.com/2011/05/more-guidance-on-building-high-quality.html)