A common question that is asked by businesses and website owners is: does Google rewrite meta descriptions? The answer is yes. Google will automatically rewrite some of your website’s meta descriptions if it feels that they more accurately reflect the content on that page.
This can annoy some who want to display what they just wrote, so the next logical question is how to decrease this possibility as much as possible.
Kim Herrington, an SEO and SEM consultant, has discovered that when e-commerce stores focus on high-traffic keywords, there is a greater likelihood that their original meta descriptions will appear as intended on their websites.
This means there is a way to control this to a certain extent, but don’t be surprised or frustrated if Google rewrites your meta descriptions. It’s always better to write them and then let Google decide if it feels it needs to be rewritten or not rather than not writing them at all.