The penultimate letter of the Hebrew alphabet has two different names, though it’s technically the same letter. Jews pronounce it Shin [שׁ] when it has a dot over the right side, symbolizing kindness, and Sin [שׂ] when it has a dot over the left, symbolizing judgment or severity. Its three vertical lines (or fiery branches, depending on the font you read it in) denote will, intellect and emotions, although a host of more obscure ideas are also associated with the letter. (The tefillin sports a rare four-branched version of shin.) Shin’s numeric value is 300. Written in full, the five letters of Elohim (aleph-lamedh-he-yodh-mem) also total 300.
Make of that what you will. I’m not sure I can do a lot with it. As with much Hebrew symbolism and numerology, I just file it under “interesting” and move on.