You might've seen that there is a gap between columns in a section in Elementor
You can remove or change these gaps from columns of a section in Elementor.
In order to adjust the columns gap in Elementor:
1. Select the section you want to change/remove the gap from columns of it, so that a dashboard on the left will emerge with the section's settings.
2. In Layout tab, look for Columns Gap option.
3. If you want to remove the gap entirely from all columns of the section, select No Gap.
4. In order to change the size of the gap, you can try other options.
5. Update the page.
If you want to remove default space between widgets in Elementor, read this article.