discourse/app/views/users/show.html.erb

<h2><%= @user.username %></h2>

<% unless @restrict_fields %>
<p><%= raw @user.user_profile.bio_processed %></p>
<% end %>

<% content_for :head do %>
  <% if @restrict_fields %>
    <%= raw crawlable_meta_data(title: @user.username, image: @user.small_avatar_url) %>
  <% else %>
    <%= raw crawlable_meta_data(title: @user.username, description: @user.user_profile.bio_summary, image: @user.small_avatar_url) %>
  <% end %>
<% end %>

<% content_for :title do %>
  <%= t("js.user.profile")%> - <%= @user.username %> - <%= SiteSetting.title %>
<% end %>