A lot of people are still more concerned about their weight than their actual shape/form/look. The most common thing people say when you ask them about their goals is that they want to lose weight. I can only agree with this if your weight is actually causing you some sort of bodily harm, for example, pains, strains and lack of mobility which hinders you from doing certain activities. I want to touch on something that most people don't realise when it comes to gaining and losing weight and that's water retention. If you're on a reasonably high carb diet you will store more water in your muscle. When the body stores glycogen, it stores 1 gram of carbohydrate to about 3 grams of water (2.7 to be more precise). When people go on so called LCHF (low carb, high fat) diets they lose weight instantly thinking that it's actually fat they are getting rid of but in most cases it's mostly or just the water that slowly leaves your body. The same goes for the other way around. If you're on a low car diet and change to a high carb diet, you will gain weight automatically. My record gain when going from a low to high car diet is almost 10kg from morning to evening. Most people don't believe me when I say this, even after I've explained the extreme conditions before the carb load.
The picture above (sorry for the poor quality) is taken on the same day, the day of my first competition. In the first picture I weigh 88.4kg (dehydrated) and in the second one I weigh right above 98kg. That's after a good carb load plus loads of water followed by a Brazilian all you can eat BBQ plus desserts and candy/chocolate till I had to lay down. My reward for all the hard work I had put in....
Another big reason for storing more water is your salt intake. Ever felt extra thirsty after having loads of salty food? There's a reason for that and it's called balance. Everyone should have a balanced salt intake, so if you cook your food from scratch, make sure you add salt. It also makes the food taste better. I can go on forever about this subject, but my main point is that your main goals shouldn't have to do with weight, but for example increased strength, performance, how you feel and how you want to look. I must say that during a longer cut it can be good to keep track of your weight to make sure you're not going down to quick or that you're actually slowly gaining weight.
Remember that your most accurate weight is first thing in the morning after visiting the toilet and it also has to be the day after a normal day of food, (not the day after some sort of binge/refeed/high carb day)