Full Posts vs Summaries or Excerpts
WordPress displays and links to your posts from a number of pages like home page, category archive, tags archive, date archive, author pages, etc.
By default, it shows the full article content on all these pages. This affects your site’s SEO, as search engines may find it to be duplicate content. Full articles also make your archive pages load slower.
Showing full articles everywhere also affects your page views. For example, users who subscribe to your RSS feed will be able to read the full article in their feed reader without ever visiting your website.
The easiest way to solve this is by showing summaries or excerpts instead of full articles.
You can do this by going to Settings » Reading and select summary.
For detailed instructions, see our guide on how to customize WordPress excerpts without coding.