Whenever you make any change to your Web Site which affects your sitemap, you should ping Search Engines after updating your web site. This will ask Search Engines to crawl your updated page and index the updated data. Such as after making a new post on your blog site or when you add a new page to existing site.
Normally it can take a long time before your new Web Page is indexed by search engines. Therefore Pinging Search Engines is like informing them about existence of your URL, so that they will come back to crawl it.
Fortunately its very easy to Ping different search engines by using online tools. Here I would suggest to use one of the most reliable pinging sites – PingOMatic.
Interface of PingOMatic is very simple, enter name of your Site or Web Page and provide its URL. After that select the search engines which you would like to ping, you can also select all by clicking on ‘Check All’ option.
Once you select Search Engines from the list, click on ‘Send Pings’ button at the bottom of screen, this will ping all the selected URLs and will give you status on the screen.
This process helps Search Engines in finding your page and index it properly. However you should avoid pining excessively.
Excessive Pings will give negative impact and search engines can actually put your site in the list of ping spams, and totally ignore it. Therefore ping only when you actually want Search Engines to explore your site.
One good news is that most of the Blogging sites already integrate pinging mechanism in them, and they automatically ping search engines whenever you post a change.
Such as if you are using a WordPress based web site, you can find the default Ping setting under Settings>Writing Settings > Update Services.
Therefore now whenever you make a change, dont forget to ping search engines after updating your web site.