This Shabbat is called "Shabbat Mevarjim"—the Shabbat We Bless. The name is applied to each of the Shabbatot of the year that precede the beginning of a new month. Since the month of Nisan begins next week, this Shabbat blesses it.
The custom of blessing the month stems from the historical sanctification of the month, when, in the time of the Great Temple in Jerusalem, witnesses observed the new moon and testified before the Great Court. After verifying the testimony, the sages declared the beginning of the new month, sanctifying the day as "Rosh Chodesh"—the beginning of the month. In remembrance of this sanctification, we still bless the new month on the Shabbat before it begins.
However, the idea of blessing the new month is more profound than a simple custom. The Shabbat that blesses the new month embodies all the energy and power of the new month, which is why it blesses it. In turn, the month of Nisan is the month of Passover, whose central theme is the Exodus from Egypt, the liberation of the Jewish people.
Therefore, this Shabbat contains within itself the power of the month of Nisan, including Pesach and the following days.
The key lies in releasing the hidden power of this Shabbat. Just as there is a tool to release the power locked within an atom, the Shabbat prayer and the various mitzvot associated with it, such as eating Shabbat, enjoying the season, and so on, are the tools to release the potential power locked within each Shabbat, and particularly within a Shabbat as special as this one.