Particles are small block of data used on the front end. It can be compared with modules/widgets, and are configured in Gantry 5 Administrator.
[Gantry 5 Download Page] (http://gantry.org/downloads)
[Gantry 5 Documentation - Particles] (http://docs.gantry.org/gantry5/particles/particles)
[Gantry 5 Documentation - Creating a New particle] (http://docs.gantry.org/gantry5/advanced/creating-a-new-particle)
Upload both .html.twig and .yaml files in templates/g5_hydrogen/custom/particles/