Google determines the relevance of the content of your site to search terms entered by users by ‘crawling’ your site. 

The interesting thing is that Google can slow down your site during the crawl process. Maybe more importantly, Google does not crawl your site fast enough for you. In any case, you can try to influence the timing of the Crawl.

The first step is to make sure you have your site in Webmasters Tools. There you have the ability to set a different timing of the Crawl. As stated by Google:

Change the crawl rate:

1. On the Webmaster Tools Home page, click the site you want.
2. Click the gear icon , then click Site Settings.
3. In the Crawl rate section, select the option you want.

The new crawl rate will be valid for 90 days.

This is just another tool for you to influence how Google sees your content and its relevance to your ‘intended reader’. 

Before I end this Post, I cannot miss the opportunity to stress how important it is to have a sitemap for your blog or Web site. More on that in another post.