|This page in a nutshell: If you have the ability, please boldly assist Wikipedia by fixing the issues flagged by maintenance templates!
All problems on Wikipedia are resolved through the efforts of volunteers like you. If you understand the problem that the template highlights, such as by reading the explanatory links it contains or have found guidance through this page – and have reasonably fixed the issues – you may simply remove the maintenance template; it will not be removed automatically.
Many Wikipedia pages display maintenance templates that address problems with the topic or content of the page. You may have arrived at this help page after you clicked on a link in just such a maintenance template, that said "Learn how and when to remove this template message".
Maintenance templates are added and removed by volunteers. This help page explains the process for examining and removing such templates.