Does anyone know what this does ?

uses: ./

I see it used in quite a few places but cannot seem to find any reference for it.

>Solution :

The uses keyword of github actions is used to specify the action that should be executed as part of a workflow. The ./ value tells GitHub to use the action defined in the current repository, rather than referencing a pre-built action.

It’s also possible to specify the path to the action within the repository, rather than using ./. For example:

steps:
  - uses: ./path
    with:
      parameter1: value1
      parameter2: value2

This would execute the action located at ./path within the repository.