You can search in two ways.
To contact posters, click on the link "Send Email response" on the detailed ad page. Enter the details like your email id, phone number & message, and click on "Send". Your response will be sent to the poster.
You can also call the phone number if it is available in the ad.
You can share any ad with your friends by clicking on "Message icon" available in detailed ad page. You can also share ads via Facebook, Twitter and G+ by clicking on the respective icons available on detailed ad page.
You can mark an ad Favorite for future reference by clicking on "Favorite" icon available in detailed ad page.
On the advance search results page, you will have an option to save the search. Click on that link, enter your email id and submit.
Important step: Now check your email for our message and click on the activation link to receive matching ads in your inbox.