What is to be considered when choosing what slope to descend on ?
As a moderator I can see that you are from a country that does not speak English as a first language. Please understand that for a question like this, most people in the US would believe that this question is not serious because the answer is very obvious. A serious answer to this question is that the first thing to consider is safety:
Do you have the ability to ski down the slope of a certain width and steepness, considering whether the snow is soft or hard and whether or not obstacles like rocks and trees are present.
If you don't know the answer to this, then you should be skiing under the guidance of a professional who can make an assessment for you.
There are too many other potential safety concerns to list in a single thread. If you read more threads in this forum you will discover many of these. Most of these are common sense. Some can simply be learned through experience or by skiing with more experienced people.
I have taken beginner courses for ski , but I haven't been given any advice for analyzing slope conditions from the instructor .For me any slope is the same (well except the steepness) . I think I don't have enough experience . I wanted to post on this forum because here are people who have been skiing on big slopes , me I have just skied in a few of them in Romania .
Experience helps. Try slopes that don't scare you at first. Then try slopes that look a little harder.
Most slopes are marked by difficulty (Easy, Moderate, Hard). Marking systems differ. In the US, easy slopes are marked with a green dot, moderate slopes with a blue square, and hard slopes with a black diamond (or two).
Difficulty depends on steepness, for one thing, and snow surface for another (as well as other factors). A moderately steep slope that has bumps (or moguls) in it is more difficult than a steeper trail that's groomed and smooth.
In the Alps there are 4 levels of slopes. Green, Blue, Red, and Black--green is easiest and black hardest. I notice that on a list of ski areas in Romania none of them have any green slopes. I don't know if this is because Romania doesn't use the green rating, or because there simply aren't any easy slopes. Remember that how different ski areas rate a slope differs from area to area. A run that might be a blue at one area might be like a red at another. So when you ski at a new place start with the green rated slopes until you get an idea how difficult it is. When the snow is very hard and icy it will be more difficult and if there is fresh snow that has not been packed down it will be more difficult until you learn how to ski snow like that. Also, as a beginner you should avoid runs that have a lot of moguls (bumps), until you are ready to learn how to ski those. Finally, use your own judgement--if a slope looks steeper or icier than you are comfortable with, don't ski it, no matter what the rating is.
If you are planning to ski in the Alps, plan on skiing only on the marked pistes until you are more experienced. Skiing off of the marked ski runs can sometimes have the risk of avalanches, cliffs, and other hazards.
Also watch out for different types of snow and ice. A slope that is easy to ski when it has soft snow on it will be a nightmare when it is a sheet of boilerplate ice.
I can think of two, both will be skiable in the morning when the Pistenbullys have pushed soft snow on to them but by the afternoon that has all gone and only the ice remains to catch out the unwary.
Val d'Isere the run back to the resort from Solaise.
Meribel Mottaret the run down on the Courcheval side.
Here is an example - watch for the glare of the blue ice in the last seconds of the clip.
TOP TIP If you see something like this stay right on the edge of the run if you can, there is often still soft snow there.