Historically, Manono island has been the centre of the district. In modern times, the main centre is Mulifanua where the inter-island ferry terminal is located for ocean crossings between Savai'i and Upolu.
With an area of only 27 km², Aiga-i-le-Tai is the smallest electoral district in the country with a population (2001 Census) of 4,508. Va'a-o-Fonoti is the only electoral district with a smaller population.
Historically, the naval power of Manono and Apolima played a major role in political power-struggles between the national clans.
One of the most important chiefly (matai) titles in the district is Leiataua. The district is also a major leg of the Sa Malietoa clan. Manono plays an important part in the election of the Malietoa title-holders, as Malie village must consult with Manono in the election of title holders, hence the importance of the Malietoa title in this district.
Today, the ferry terminal at Mulifanua, situated on the northwest coast of Upolu, is the second-most important port on the island, after the busiest harbour in the capital Apia. The port is the main inter-island connection to Savai'i island. A regular passenger and vehicle ferry operates seven days a week, during the day, between Mulifanua and Salelologa ferry terminal on Savai'i. Views of Apolima and Manono can be seen during the crossing.