Does my meta description heavily effect my ranking? This is a question that I get asked all the time, and the answer is absolutely not. Meta description does not help you a bet in Google ranking, but if this is the case, why would anyone write meta description? There are many reasons why you should write meta description. The most important reason to write it is that it really helps your click rate. when users find your site on Google, they first read your meta description to decided if your site is the one they are looking for. If the meta description is not clear they will click on another site. The second thing is that if you do not write meta description, Google will write it for you. Google will choose some random content on your site to display it. These random content will be based on the users search and it might change from one search term to another.
Some asked me that they do not see the meta description that they wrote, instead they see different text on the search engine when it comes to some search terms. this is true, what happen is that google first read your meta description. If your description does not include the keywords the user is looking for, Google will choose some text on your site that does include the search terms and displays that instead. what you need to do in order to avoid such a thing is to change your meta description in order to catch most keywords needed to show your description on major search engine.