Original content and a ban on copying texts from other sites!
What Panda algorithm does, is to monitor the plagiarism on the Internet. Using this algorithm Google finds out to what extent your texts are personal work and not copied from other sites. As in our real life, we are interested in unique things, the same principle applies to Google which ranks first sites that differ from the rest of the Internet (based on content).
The texts you post, whether they are descriptions of products, services or news must always be as unique as possible. Depending on the percentage of copied content from other sites, your site loses its reputation and it goes to a rear position.