Should you use trackback links as a part of your SEO strategy?
One of the ways people try to build links to their website is with trackbacks. It can be used in a white hat SEO strategy, but it has been abused in black hat SEO tactics for a number of years.
Trackbacks alert webmasters if their site has been linked on another website. By approving the trackback, you will be providing a link from your site to the original source. This is what most black hat SEOs want to achieve from this tactic.
In your case, it is fine to approve trackback links if you feel that it will add value to website. It is also ok to link out to sites to cite them. They may reciprocate the link as well.