This is the (tentative) conclusion of a meta-analysis found on the WHO's website, written by John Ioannidis, which in its abstract says:
Across 51 locations, the median COVID-19 infection fatality rate was 0.27% (corrected 0.23%). [...] In people < 70 years, infection fatality rates ranged from 0.00% to 0.31% with crude and corrected medians of 0.05%.
[... and in its conclusion... ]
Most locations probably have an infection fatality rate less than 0.20%.
Ioannidis also self-cites that in a later paper to say a bit more concisely:
Global infection fatality rate is 0.15-0.20% (0.03-0.04% in those <70 years)
According to Wikipedia, Ioannidis was criticized for some previous (primary) studies on the matter. So is this meta-analysis essentially correct or possibly misleading in some way?
Note 1: according to the mods, this a distinct question from Did WHO publish a bulletin stating that COVID-19 is “equivalent in lethality to seasonal flu”?, although it's obviously related as it was considered in an answer there as being what someone (else) implicitly referred to.
Note 1-bis: That meta-analysis has also been cited in a letter to the editor of the BMJ (by a certain Eshani M King) to say that
A recent peer-reviewed paper by one of the world’s most cited and respected scientist, Professor John Ioannidis of Stanford University, quotes an infection fatality rate (IFR) for Covid of 0.00-0.57% (0.05% for under 70s), far lower than originally feared and no different to severe flu. This paper is published on WHO’s own Bulletin but ignored by UK mainstream media.
(emphasis mine). But Ioannidis himself never seems to make an explicit comparison with flu and there are some other questions here on Skeptics about the appropriateness of the comparison, so let's stick with the original/technical claim in Ioannidis' own paper(s) for this Skeptics question.
(The sub-claim in that letter of the paper being ignored by the press is somewhat inaccurate. The Daily Mail, for instance, did cover the paper in a stand-alone article.)
Note 2: infection fatality rate is not case fatality rate. The former includes in the denominator all those infected, even if asymptomatic.