Google will sometimes use the content of the meta description tag as the description for a Google SERP.
The Meta Description Tag added via the Stallion WordPress SEO Plugin matches the description Google is using for the “SEO Tutorial” Search.
A specific description can be more enticing vs a random snippet chosen by Google.
This does NOT have any impact on where in a SERP a webpage will land, however if the description is more enticing to a potential visitor than a random description from a webpage then it could result in a higher click through traffic from Google.
Your not going to get better rankings, but you might get more clicks with the current rankings. Consider the meta description tag as ad copy, this is where you try to convince a Google user your webpage at number 3 in a SERP is a better choice than the results above it.
Continue Reading WordPress Meta Tags Optimization