How to Improve Old Content
So, what can you do? Remember, you only have a few seconds to grab a visitor's attention. And, of course, all that they can see is the title and the meta description. If you are not adding your own meta description, then Google will use whatever it thinks is suitable. Typically, this will be the first sentence or two from your post. Does that give the information that you want to show your audience? I am not going to reinvent the wheel and suggest you take a look at this quick guide from Jay.
Move on for a few more tips.