Honey jars are mainly used to sweeten a relationship, but you can also use it on your self to become more kinder and harmonious. Some people use honey jars for things other than magick, like marking an anniversary or when they get married.
A reminder that sweetening can be applied to anything. If one has a certain view, everything is a spirit, even ideas such as money. You could also see this as spiritual energy being drawn towards you and your goal ("You catch more flies with honey"). Sweetening jars can be used for prosperity, healing, reconciliation, marriages, etc. Honey isn't the only substance used; sugar and syrup are cheaper. Sometimes they are seen as faster ingredients because they pour quicker than honey. This is a reminder to think outside the box when it comes to sympathetic magic.
In a way, honey can bind things as after a while of it sitting, it will crystallize. So, you can devise a working suitable for this purpose, such as pinning yourself down with a job, holding prosperity, keeping your health, and anything else you want to draw and bind.