What is Bounce Rate and how to solve it?

What is Bounce Rate and how to solve it? to its core, the tips to reduce bounce rate, we have to know in advance what is meant by bounce rate, so as to know its purpose. Bounce rate, which is the average percentage between traffic with page views a blog post. 

This means that the ratio between the number of visits divided by opening the page in a certain period. Why is a period of time? Since