Duplicate content can indeed hurt your SEO efforts. Above all, search engines want to show the best possible quality websites and content to their searchers. Something like duplicate content, which is likely redundant and offers nothing new to searchers, will be penalized in search results.
While it is good practice to avoid duplicating content, there will be times when it is neither done with malicious intent nor is inevitable. You can avoid being penalized, however, through certain tech adjustments like ‘canonical’ tags. First Page offers these adjustments as part of our comprehensive and bespoke SEO campaigns.