>>283684852
>The image is filled with dots
It's called "dithering", Mr. tech savant.
>>283684852
>and the yellow star lost a bunch of detail
If you zoom in 500%.
>The jpg was an example [...] if you want an animation you use webm or mp4
Those aren't .jpgs, those are different formats entirely.
.GIF gives you the convenience of having static images or movies in the same file. What other extension you know is widely popular that can offer the same?
Leave it in the comments below.