what is inbound link?

Links are of two types inbound and outbound. Inbound links or backlinks are always come from some other site to yours. It is the best helping tool for the SEO writing in order to enhance the traffic on your website. Do you people agree with me?
Inbound links are those links which comes from other sites to your site while outbound links comes from your site to other sites. These tools are used for improving the traffic on the website for enhancing the rankings on the Google. What do you think folks?