In brief
float places an element to one side and lets text wrap around it. This differs from arranging independent cards in a grid.
Useful to know
float places an element to one side and lets text wrap around it. This differs from arranging independent cards in a grid. [1]
It can suit an illustration within an article. For an entire interface layout, consider flex or grid first. Otherwise wrapping can leave subsequent text in an unexpectedly narrow column.
Sources
For further detail and to check the information: