It signifies that something is not surprising or very understandable.

यह आश्चर्य की बात नहीं है

English Usage: Its little wonder that she won the award given her hard work.

Hindi Usage: इसमें कोई आश्चर्य नहीं है कि उसने पुरस्कार जीता, उसके कड़ी मेहनत को देखते हुए।