The real histogram freaks would look at this and tell you how this screams about all the white balance work you need to do because you have your colors peaking in different places. There's a science to that obsession, but I can't go there.
How is that possibly applicable in this image? (rhetorical). Peaking in different places can be important to white or gray things, because their definition is that they have equal RGB components (and equal in white is the meaning of white balance).
But it hardly applies to green grass or red bricks, they have no supposed relationship. "Where" they peak depends NOT on brightness, but a peak is only about HOW MANY pixels there are with components of that same color value, be it dark or bright. That in turn simply depends on the image content, about what we aim the camera at. There are no hard rules about aiming the camera.
In this case, we have more green grass pixels than we have red brick pixels, and even fewer squirrel pixels.
We could shift the White Balance sliders drastically to even up the green grass and red bricks, but that of course seems extremely wrong here.
It really does Not matter what the shape of this or any histogram is. Scenes vary, and histograms vary. Some scenes have bright content, others have dark content. A histograms shape is what it is. We can affect it with lighting and exposure though.
It is normally good (in average pictures) to not have much blank space at right end, which can often imply more exposure might have been a good thing (only if assuming we have some white or bright objects that ought be bright up there).
There is no blank space on either right or left end of this one. Both ends are clipped in some degree.
But what is most important is the clipping at the 255 right end. This one has the slightest red clipping of the red bricks, not enough to matter much, if at all. Daylight and Flash WB tends to cause red to clip a bit. Importance kinda depends on what it is that clips, if there is any important detail lost.
The significant trick to learn in Lightroom (or other Adobe Camera Raw) is that (for temporary examination purposes) you can hold down the ALT key (Windows, or Option key in Mac) while increasing the EXPOSURE slider (this is also true of holding ALT on the Adobe Levels tool White and Black Point sliders). Holding that ALT key and then touching the Exposure slider then instead shows WHICH PIXELS are being clipped at 255 (at the present Exposure slider value). Clipping loses detail in those clipped pixels. Here, any clipping is just the highlight on the top of the red brick behind the squirrel. Depends on how fussy you are, but it does not hurt any important detail here, nothing important is lost. You can judge it and adjust brighter exposure (more clipping), or less exposure, which in slight degree, might sometimes appear to regain a bit of detail (but clipping the camera is lost and unrecoverable detail).
Holding ALT while sliding the BLACKS slider shows the same thing at the black end. Here, red is more severely clipped at the dark end, simply because there is no red in that green grass, red has zero value there (red and green are compliments, or opposites). Red should be zero in colors that have no red component (and we have many of them here).
I think this histogram is showing that there is no better exposure of this scene. We could however arbitrarily make it brighter, by increasing the clipping on the top of the red brick edging.