Connecting fonts to the site and formats?

Question

css

I include fonts like this:

@font-face {
  font-family: 'heliosthin';
  src: url('../fonts/heliosthin.eot');
  src: url('../fonts/heliosthin.eot') format('embedded-opentype'), 
  url('../fonts/heliosthin.woff') format('woff'), 
  url('../../fonts/heliosthin.ttf') format('truetype'), 
  url('../../fonts/heliosthin.svg') format('svg');
  font-weight: normal;
  font-style: normal;
}

Those. there are 4 formats: eot, woff, ttf, svg
Is this enough for cross-browser compatibility because there are about 15 other font formats. Whether it is necessary there for example woff2?

Answer 1

https://developers.google.com/web/fundamentals/per...