What influence did early Muslim traders have on Europe and North Africa?

I would say the Islamic religion.

Explanat

Muslim traders connected European and North African merchants with the Far East and Asian trade routes. They often traded spices, silk, and cotton textiles. They also traded ideas, including advanced mathematics, chess, and Arabic numerals. The Arabic language and the Islamic faith spread rapidly in North Africa. Today, Arabic is the official language in all North African countries and Islam is the most common religion.