The share tells a story that poverty is decreasing at all levels, relatively speaking. The distribution tells the additional story that population has increased: there may be less change in the number of people at the $20-30 level and the $30-40 level in recent decades than the share alone would suggest.
Distribution: https://ourworldindata.org/grapher/distribution-of-populatio...
Share: https://ourworldindata.org/grapher/share-in-poverty-relative...
The share tells a story that poverty is decreasing at all levels, relatively speaking. The distribution tells the additional story that population has increased: there may be less change in the number of people at the $20-30 level and the $30-40 level in recent decades than the share alone would suggest.