This is a sample of bitmap that I drew. :) For your information, this image itself is a bitmap image captured by my phone camera.
Bitmap-based files are more suitable for photo-realistic images that require complex color variations.
File names for bitmap-based images usually consist of extensions such as: .psd / .jpg / .gif / .tif / .bmp
For a better understanding, enlarge the image and you will see the difference, vector images will still remain the clean and sharp outlines, while bitmap images will appear blurry with the square thing, which we call it as bit array or bitmap index.
P/s: This is the first week, so we just revise on bitmap.