Perhaps Samoset's greatest service to the Pilgrims at Plymouth was to assert himself in a friendly manner by coming into their pitiful encampment and greeting them respectfully in English.  He came alone, with an empty quiver and a bow with a single, tipped arrow, which must have been a great relief to the nervous colonists who had seen Indians "skulking" nearby who had stolen their tools. 

In that first meeting, Samoset was able to explain that the area was mostly uninhabited because of a plague four years earlier. He reassured them that the land they were on was unlikely to be a place of contention, but that they needed to watch out for the aggression of the Nauset, who bore grudges against the English for their earlier slave trading.

Much has been written about Samoset's introductions of other helpful natives, such as Massasoit and Squanto, but it is arguable that his ambassadorship was the first positive interaction with Indians that the Plymouth Pilgrims experienced.