For many, mala's have no religious or spiritual meanings to the owner or wearer, but are commonly worn as "physical reminders of positive intentions".
When wearing mala's for this reason, it's simply a way to consistently give yourself a gentle reminder of whatever you choose to associate with the mala. For example, a reminder to treat yourself well by meditating and exercising often, in addition to treating those around you well. While Mala's can be used as a meditation tool, there is no one definition or correct meaning as to what a mala is, it is up to each individual to determine what meaning their mala holds for them.