What does this mean?
A page contains several 'description' meta tags, which may lead Google to display the wrong one. You should only have one on each page.
Neither meta descriptions nor meta keywords factor into Google's ranking algorithms for web search.
Meta descriptions can however impact a page's CTR (click-through-rate) on Google which can positively impact a page's ability to rank.
What to do?
For that reason, among others, it's important to put some effort into meta descriptions.
Find out more, here: https://sitebulb.com/hints/on-page/multiple-meta-descriptions/