  One of the central issues concerning the mechanism of high temperature
superconductivity in cuprates is the nature of the ubiquitous charge order and
its implications to superconductivity. Here we use scanning tunneling
microscopy to investigate the evolution of charge order from the optimally
doped to strongly overdoped Bi2Sr2CuO6+{\delta} cuprates. We find that with
increasing hole concentration, the long-range checkerboard order gradually
evolves into short-range glassy patterns consisting of diluted charge puddles.
Each charge puddle has a unidirectional nematic internal structure, and
exhibits clear pair density modulations as revealed by the spatial variations
of superconducting coherence peak and gap depth. Both the charge puddles and
the nematicity vanish completely in the strongly overdoped non-superconducting
regime, when another type of short-range order with root2 * root2 periodicity
emerges. These results shed important new lights on the intricate interplay
between the intertwined orders and the superconducting phase of cuprates.
