Like all oils, it's moisturizing. Almond oil has similar properties to olive oil. It partly penetrates the hair shaft and it's good for reducing frizz and tangles. It has less scent though.
I've never heard of it increasing growth or thickness. I don't think any oils do that.
2c/3a-M-ii porous, good elasticity, APL, dark brown with a silver lining. Biggest enemy: frizz!