"To understand this aspect" means to have knowledge or comprehension about a specific part or element of something. It implies gaining insight or familiarizing oneself with a particular aspect of a subject. Full definition
One of the least understood aspects of school systems is decision making. (kappanonline.org)
One of the most significant yet least understood aspects of the propaganda issue is the range of ways in which social media companies deal with government officials. (entrepreneur.com)
Choose an attorney who best understands these aspects of your case. (bwglaw.com)