using outbound links for your website or blogs never means that you must linkup with bad links. all Search engines keep in track of outbound links, it helps you to avoid linking to banned or bad website and blogs.
Outbound links are those links which go to other website from your website. It is very helpful in SEO, more the number of outbound links more will be its credibility.
A study conducted by marketing firm Reboot aims to show that there is a positive correlation between a page’s outgoing links and its search rankings. Reboot hypothesized that Google can determine the authority of a page or website based on what other authority sources it associates itself with (by linking to them).
Outbound links are links from your site pointing to other site. A different way to say inbound links is backlinks and a different way to say outbound links is internal links.