Its quite broad or boring explanation for this question but I came up with this only-

I am somewhat familiar with how server side caching with redis work . I can create caching for those webapp whose data doesnt change so fast but surely for socail media the feeds are going to be so randomized and flexible and fast. I have the idea where I redis key will be the link of the home site and the value will be what retured from the server as a json and will be store as strinigify json. But I think is not good cause as it will be a single page application so it will show same feeds again and again. Now I can keep the time less but then I guess it will slow down the server. Whats Your Opinion