Google Inc. shares went down 4.7 percent after Tuesday's session of the stock market, which marks the biggest drop the online search engine experienced this year. This also is a strong indicator that the holiday season isn't going to produce the income Google was counting on. Investors and experts are probably surprised to find that Google is having a hard time selling advertisements this time of year.

Google makes money by selling online advertising and referring shoppers to the sites of retailers, and over the past few months the company's shares have gone straight up. Since the holiday season is just around the corner, investors were hoping to see the shares go sky-high and produce huge amounts of money. This is hardly the case for Google these days, and the investors are starting to become impatient.

Over the last few years, the Monday after Thanksgiving has been set as an indicator of the holiday sales outlook for Internet businesses. Based on the recent results of Google, investors have little to no clue what the financial status of the company will be like.