typos and robots.txt clarifications

doc/Installation.md

@@ -110,7 +110,7 @@ file is divided into multiple sections, which are enclosed in square brackets.
 
 In the `[main]` section you can enable or disable the discussion feature, set
 the limit of stored pastes and comments in bytes. The `[traffic]` section lets
-you set a time limit in seconds. Users may not post more often then this limit
+you set a time limit in seconds. Users may not post more often than this limit
 to your PrivateBin installation.
 
 More details can be found in the
@@ -120,13 +120,13 @@ More details can be found in the
 
 ### Web server configuration
 
-A `robots.txt` file is provided in the root dir of PrivateBin. It requests bots to
-not access (and potentially burn) your pastes. It is recommend to place it into the
-root of your web directory if you have installed PrivateBin in a subdirectory.
-Make sure to adjust it, so that the file paths match your installation.
-Of course also adjust the file, if you already use a `robots.txt`.  
-More bot detection is implemented in JavaScript, but note none of these mechanisms is a
-100% fail-safe way to prevent non-human visitors on your site.
+A `robots.txt` file is provided in the root dir of PrivateBin. It requests search
+engines to not index your site so the paste keys are not leaked. It is recommended
+to place it into the root of your web directory if you have installed PrivateBin
+in a subdirectory. Make sure to adjust it, so that the file paths match your
+installation. Of course you can also adjust an existing `robots.txt` file. More
+bot detection is implemented in JavaScript, but note none of these mechanisms is
+a 100% fail-safe way to prevent non-human visitors on your site.
 
 A `.htaccess.disabled` file is provided in the root dir of PrivateBin. It blocks
 some known robots and link-scanning bots. If you use Apache, you can rename the