The most common knots for your neck tie with corresponding instructions can be found here!
In the past it was mostly larger companies who ordered ties for their employees. This was especially for employees with a representative function, who wore ties for fairs and conferences...
Two-tone jaquard woven neckties. Luxury ties by Profuomo.
New luxury ties
The range of luxury ties has been expanded to include timeless two-tone ties in a variety of colours.
Which type of tie you wear is not really subject to trends. It mainly has to do with your posture, what suits the time of year, the occasion and of course what you like