When linking to an anchor, the browser goes to the bottom of the page. For example this is the link to the anchor of "Use Groovy classes instead of Java classes" section in Groovy Module:

https://docs.magnolia-cms.com/product-docs/Modules/List-of-modules/Groovy-module.html#_use_groovy_classes_instead_of_java_classes

However, in legacy docs, anchors worked fine:
https://documentation.magnolia-cms.com/display/DOCS61/Groovy+module#Groovymodule-UseGroovyclassesinsteadofJavaclasses

This is quite important and helpful when customers need links to specific sections in support tickets.