The basics:

Founded in 2020 in direct response to the coronavirus pandemic's impact on the restaurant industry, Trust20 is laser-focused on helping independent operators implement practices that keep their staffs, customers, and community safe. To do this, they've created 20 benchmarks within the categories of cleaning & sanitizing, social distancing, employee health & safety, and diner health & safety, and help restaurants achieve these standards with consultations, webinars, and more.

From the BOH TipJar:

Trust20 offers cleaning 
and safety auditing to make sure your restaurant is up to snuff sanitation-wise. If your restaurant meets all 20 tactic standards, it receives a certification window sticker and is added to the company's diner-facing certified list. That way, your customers will know you’re #Trust20Certified.

In their own words:

Trust20 is home to a new standard of restaurant safety and diner comfort. Trust20 Certified restaurants are part of a national network of restaurants that meet a high standard of cleanliness and safety, giving diners confidence in the measures you are taking to keep them safe!