Knowing what file format to use can make a huge difference. In certain cases you want to use a certain file format to save the work you've done. Different file types are used for different programs and different types of work.
10 Best Google Font Combinations You Haven’t Tried Yet
I like these fonts because I feel like when fonts are serif they look more sophisticated. I especially like the Los Angles one because it looks very fancy. I also like the spacing between the Dallas font.