For many business site, in order to attract customer’s attention, the post title is usually comes in two parts called commodity name and promotions. If you want to achieve this effect, wordpress plugin Secondary Title is very useful.
You can add Secondary Title to your post title, set the location of promotions info, to achieve better results, you may add a little css style code. for example, you can change the font color “20% off” to red. To try this plugin, it may be helpful to your sales promotion.