Using dot or "source" while calling another script - what is the difference?

Using dot or "source" while calling another script - what is the difference?

bash dot-source

bash

Run bash script as source without source command

bash dot-source

bash

"source" command in shell script not working [duplicate]

bash shell command-line-interface sh dot-source

bash

What's the difference between: ". [script]" or "source [script]", "bash [script] or $SHELL [script]", and "./ [script]" or "[script]"?

linux bash shell dot-source

bash

difference between #./ and #. ./

linux bash dot-source

bash