The Instagram has changed the communication between people.

You could also say ‘Instagram has changed the way that people communicate’ or ‘instagram changed how people communicate’

Now people can communicate with each other using photos, which is much more emotional than just words.

Combining these two sentences sounds better to me. I don’t think the way you had it before is necessarily wrong, but in combining the two sentences, I think you improve the flow of your writing. Also, “which is much more emotional than just words” sounds kind of matter of fact, when it’s actually an opinion. It’s not wrong, but I might write the sentence like this -

Now people can communicate with each other using photos, which I think is much more meaningful than just using words.

It's much better to see it once in a shot than describe it in 100 wordsa picture than a one hundred word description.

The tone of this sentence is like you’re stating a fact. This isn’t necessarily wrong, but you’re sharing an opinion, so instead you might want to say

I think it’s much better to see pictures instead of 100 word descriptions

Most of the photos I snap are of when I’m in a good mood or whan I I hang outging out with friends.

This is crystal-clear, I try to keep the memoryies of remarkable moments and share ithem with my friends.

I climbed to the top of a mountain in the Urals and stood there looking at the forest, lake, and surroundings from the top.

Without it,one, the photos are blurry.

You could also say “without one, I find that the photos are blurry” or “Without one, the photos turn out blurry”

In the future, I'd like to buy itone and improve my creations.

You could also say “in the future, I’d like to buy one so that I could improve my creations”

The Instagram has changed the communication between people.

It's much better to see it onceall in aone shot than to have it describe itd in 100 words.

The original comparison doesn't work because the person who is seeing the work isn't the same as the person who is describing it.

Most of the photos that I snap are taken when I am in a good mood or whan Ien I hang out.

This is crystal-clear, I try to keep the memory of remarkable moments and share it with my friends.

"Crystal-clear" only works in the context of an explanation (implied or explicit), but there hasn't been one here.

I climbed the top of a mountain in the Urals and stood looking at the forest, lake and surroundings from the top.

Without itone, the photos are blurry.

You aren't discussing a specific tripod, so "one" is better.

In the future, I'd like to buy itone and improve my creations.

The Instagram has changed the communication between people.

Or: "Instagram has changed how people communicate."

It's much better to see it once in a sphoto than a describeption of it in 100 words.

Most of themy photos I snap while in a good mood or whan I Ien hanging out with friends.

This is crystal-clear,important to me; I try to keep the memoryies of remarkable moments and share ithem with my friends.

This usage of "crystal-clear" does not feel right. Usually this phrase is used in regards to making an explanation simpler or obvious (or pointing out this simple/obvious explanation) rather than emphasizing a point as you are doing here.

I climbed to the top of a mountain in the Urals and stood looking at the forest, lake and surroundings from the top.

"from the top" is unnecessary since you already said you climbed to the top.

Without itone, the photos are blurry.

"it" would be better if referring to a specific tripod rather than just "one" generally.

In the future, I'd like to buy itone and improve my creations.