By using this so called REVISIT-AFTER meta tag you can tell the spider to come back to your website and index it again. This meta tag is used by several North American search engines.

<meta name="revisit-after" content="period">

Example how to use the meta tag revisit-after:

Add the following meta tag in the file "index.php" source:

<meta name="revisit-after" content="7 days">
<meta name="revisit-after" content="1 month">

Where do you add this revisit-after tag?

Once the "index.php" file is opened in a text editor then you should fine some lines which starts with tags "< meta" within the "< head >" section. Just place the code in a new line as like the example above.

In the example it clarifies to the bot (search engines crawler) to re-visit your site for crawling every 7 days for updating and the other one specifies 1 month.

INFO: There's a paid addon available for SNetworks PHP Classifieds v5.7.1 or later versions. Which has dynamic meta tags generator, and creates different meta tags for every different pages of your website. If you're into making your site more search-engine friendly then you may want to contact SNetworks Sales for further assistance regarding this addon.