If you are using a custom form to capture leads in your website, add the following html in your form:
<input type="hidden" name="Channel" value="[channel]" />
<input type="hidden" name="Source" value="[source]" />
<input type="hidden" name="Campaign" value="[campaign]" />
<input type="hidden" name="Term" value="[term]" />
<input type="hidden" name="Content" value="[content]" />
<input type="hidden" name="Landing-page" value="[landingpage]" />
<input type="hidden" name="Landing-page-subfolder" value="[landingpagesubfolder]" />