Rakuten is offering extra cash back in categories they are billing as "essentials" through the end of the month, though they tell us that this will possibly last even longer than that. They have split up increased offers into the following categories:
While not all inclusions are necessarily "essentials", they do mostly fit into things in which you may be interested as you sit at home social distancing.
As always, check cashbackmonitor.com to be sure you're getting the best rate. That said, since Rakuten gives you the option to instead earn the same rates in Membership Rewards points rather than cash back, you may value these payouts more. If you're not yet earning Membership Rewards points through Rakuten, remember that it is possible to change your earning preferences. Also see our guide to the Rakuten Visa with Membership Rewards. Everything you need to know.