there are many different ways to use the concept of modes. what many people seem to not understand though is the difference between tonal and modal music. modal music is not very popular anymore and hasn't been for a few hundred years. that does not mean modes are not useful in modern music, but i think people misunderstand what ot is they are actually doing.
this is probably the best explanation of how modal and tonal differ.
There are alternate usages for the term "modal" music. In the jazz world, modal music means something very different.
See attached:
Invalid Link Removed