How to add artist to title?

Support
1

The artist is in the metadata but not in the title itself like
its "3005" but I want it to be like "Childish Gambino - 3005"

2

To create a new filename from scratch, try
Convert>Tag-Filename
Format string: %artist% - %title%

If you have not yet filled the field TITLE with the contents of the filename, try
Convert>Filename-Tag
Format string: %title%
or even
Format string: %artist% - %title%
(there is a preview to help)

To add just the contents from ARTIST to that what is already in the filename (which means that you can run this only once, otherwise you add the artist to all the already added artists, so probably the first method is better)
try
Convert>Tag-Filename
Format string: %artist% - %_filename%

and in general, a look at the documentation about the first steps to use MP3tag is a good start:

3

Thank you I'll make sure to read the documentation.

4

and which of the suggestions looks like a solution to you?