Bounce Rate is a number that tells us if a visitor likes our content or not. It tells us if a visitor is finding our content relevant to what they are looking out for.
Search Engines also might want to use bounce rate as a crucial figure to decide if the visitors sent to a website found the content relevant to their requirement. This would surely enhance the search engine's user experience.
So find means to lower your website's bounce rate to rank higher.
You must choose keywords which are not competitive and at the same time gets sufficient relevant traffic.
Description meta is ment to give a brief idea about the concerned landing page in search engines like google. Unlike title element that is meant for heading, description meta element is to explain the same. A well formed description strategically should contain the targeted keyword phrase. The description shouldn't be more then 150 characters with spaces.
Note: Do not stuff keywords here, it is an unprofessional approach. Get the copy written from a professional writer for better results.
Bigger websites ranks better. So you need to add more pages to rank better.