Is Adobe Photoshop LIghtroom is the best software tool for you as a photographer; and what is the features of it that Adobe Photoshop doesn't have?

It is depend on a photographer those who uses Adobe photoshop lightroom and those who use Adobe Photoshop. But both helps in the field of photography...

Not necessarily, though Adobe Photoshop is excellent for RAW images, creative photographers  can use many online programs to edit or beautify their work.

Adobe Photoshop LIghtroom is more efficient and easy software tool for make beautiful photos