Trackbacks are simply a way to tell other bloggers that you have linked to them as you found their post useful. So it is better to include a trackback rather than including a comment on other blog.

To make a trackback to other blog it is necessary that both the blogs linking to each other must be trackback enabled. You can make out whether the other blog is trackback enabled or not by finding a link at the bottom of their post such as “trackback URL”.

If the blog is trackback enabled, then make use of the trackback URL to send a trackback otherwise your trackback will not be sent to designated blog and also won’t feature in the trackback section. It means when you want to send a trackback notification, you can do this by inserting their trackback link some where in your post that is published on your blog.

Many bloggers won’t enable the feature of trackback on their blog by default due to spammers misuse the tracking facility. Finding a blog that are trackback enabled and linking to them will help you in increasing the traffic because the visitors of the linked site my follow the link and visit your site. Hence trackback is a way to increase traffic to your site.