Advancing Critical Connectivity Expands Service, Small Business Resources, Opportunities, Access, and Data Based on Assessed Need and Demand Act or the ACCESS BROADBAND Act This bill requires the Department of Commerce to establish the Office of Internet Connectivity and Growth within the National Telecommunications and Information Administration. The office shall connect with communities that need access to high-speed internet and hold regional workshops to share best practices and effective strategies for promoting broadband access and adoption. The bill also requires the office to (1) develop targeted broadband training and presentations for various demographic communities through media, (2) develop and distribute publications providing guidance to communities for expanding broadband access and adoption, and (3) track construction and use of and access to any broadband infrastructure built using federal support. Under the bill, the office shall consult with any agency offering a federal broadband support program in order to streamline the application process for financial assistance or grants. The office, any agency that offers a federal broadband support program, and the Federal Communications Commission through the Universal Service Fund shall coordinate to ensure that broadband support is being distributed in an efficient, technology-neutral, and financially sustainable manner.