What is the use :anchor in link_to rails

<li class=""><%= link_to "International Events",events_events_filter_path(:id=>1,:anchor => 'critic-review'), :data=>{:toggle=>"tab"}%>
HtmlL:
<a data-toggle="tab" href="/events/1#citic-review">International Events</a>
it mewns it will execute a method and pont to some div or some place with id="rcitic-review"