A major advantage of the snowball sampling method is that it helps the researcher to focus only on

Snowball sampling lets the researcher focus only on people of particular interest, such as members of a hidden or hard-to-reach group.

Existing participants refer other suitable members, building a chain of contacts.

It does not target all people in an area indiscriminately.

It is not restricted to migrants as a category.

It is not aimed at long-standing residents specifically.

It suits studies of rare or stigmatised populations.