"tag" ignorance--patient help needed

I’m hopelessly confused about getting tracks in order by editing tags.  I installed MP3Tag and navigated to the folder with my podcasts in it, then clicked “select folder.”  In the “tag” column is the same thing for everything in the folder, and nothing I do changes that except “remove tag.”  I can’t understand the instruction–they assume I already know something about tags.  What do I do so that the files in this folder will appear in alphabetical/numerical order on my Clip instead of randomly?