Basically, it works exactly the same as Giphy or any other good GIF providing service. You put in a keyword and it gives you back a bunch of memes (exclusively Rick and Morty) based on your keyword. You can then add your own quote or cut it into a gif.
Honestly, I’m not even the biggest Rick and Morty fan and I can see myself using this for all of my meme sourcing needs. What are you waiting for, get creating!