The string "a/20180815/123062" appears to be a URL path. It is likely a reference to a specific file or resource on a website or online storage service. The path structure suggests that the file is located in a folder named "a" and is named "123062". The date "20180815" may indicate the date the file was uploaded or created. Without more context or knowledge of the specific website or service where this path is used, it is difficult to determine the exact content or purpose of the file.