Hat tip to Jan Mauritz Faber for his suggestions.

app/views/admin/groups/new.html.haml

@@ -23,5 +23,5 @@
       %li Group is kind of directory for several projects
       %li All created groups are private
       %li People within a group see only projects they have access to
-      %li All projects of group will be stored in group directory
+      %li All projects of group will be stored in a group directory
       %li You will be able to move existing projects into group

app/views/deploy_keys/index.html.haml

@@ -1,7 +1,7 @@
 = render "projects/settings_nav"
 
 %p.slead
-  Deploy keys allow read-only access to repository. It matches perfectly for CI, staging or production servers.
+  Deploy keys allow read-only access to repository. They can be used for for CI, staging or production servers. A deploy key can be added to only one project. If you need to add the same key to multiple projects you can create a deploy user and add that user to multiple projects.
 
   - if can? current_user, :admin_project, @project
     = link_to new_project_deploy_key_path(@project), class: "btn btn-small", title: "New Deploy Key" do

app/views/groups/new.html.haml

@@ -24,5 +24,5 @@
       %li Group is kind of directory for several projects
       %li All created groups are private
       %li People within a group see only projects they have access to
-      %li All projects of group will be stored in group directory
+      %li All projects of group will be stored in a group directory
       %li You will be able to move existing projects into group

app/views/notify/new_ssh_key_email.html.haml

@@ -6,5 +6,5 @@
   title:
   %code= @key.title
 %p
-  If this key was added in error, you can remove here:
+  If this key was added in error, you can remove it here:
   = link_to "SSH Keys", keys_url

app/views/notify/new_ssh_key_email.text.erb

@@ -4,4 +4,4 @@ A new public key was added to your account:
 
 title.................. <%= @key.title %>
 
-If this key was added in error, you can remove here:  <%= keys_url %>
+If this key was added in error, you can remove it here: <%= keys_url %>