Many people know this, but let’s say – what is a hashtag or what does it do? When we go to any e-commerce website or app and want to buy a product, we first select the product category we want to buy. Then we order our desired product from that particular category. For example, if you want to buy a t-shirt, you will first go to Men’s or Women’s item or category and then select T-Shirt from there and order the T-shirt of your choice. Through these, we divide all the products into many categories so that a customer can easily find the desired product.

On all social media websites including Facebook, people of different ideologies post on different topics. It is not possible to have any specific category here. Even if it was possible, the list would have been so long that the Poster would have had to be very fast to find it. So no need to select any category to post here. But if a user wants to read different posts on a specific topic on social media, how can he do that? There is no category here. To make this task easier, social media websites give users the freedom to create categories. And that is the hashtag.

Hashtags basically categorize our posts on Facebook. I think many of us posted many posts in which the hashtag #Bangladesh was added. By doing this, as many posts as this hashtag will have, of them will be considered Bangladesh category posts. Any other user can easily view the posts of this category together by clicking on this hashtag.

Now if we post the same hashtag, again and again, to protest against any injustice, then what happens – you are writing the same hashtag again and again. So that there will be no profit. Because a category will be created only once. So, of course, creating the same hashtag over and over again is nothing but sheer stupidity as far as I know. Rather, if you post different posts every time as a form of injustice, design and post posters, write and add that specific one or a few hashtags, then any other user can click on that hashtag and read all people’s protests and their opinions. To me that seems to be the smartest protest on social media. But instead of doing that if you post only the hashtags and want to see any post of that category when someone clicks on that hashtag, then only our hashtags can be seen. No constructive criticism or protest. Which I think would be ridiculous to the person who actually searched and insulting to us.

Many people are commenting on hashtags on various posts. But that is a bigger mistake. Because hashtags only categorize posts, not comments.

Create a hashtag and tell God about that protest, this really gave me the most disgusting idea. Those who say such things should read the history of Muslims and Muslim protests a little better. So let’s not get drunk on the trend and protest smartly. Apply whatever creativity you have inside, so post protest and use specific hashtags.

Physics is the science of matter and its motion. Where the behavior of substances, motion, and behavior with space and time are discussed. In the beginning, the definition of physics was much like this.
But the things I have mentioned above have gradually expanded. While reading the particle religion of matter, the wave religion has arisen. Physics has entered the world of its origin or possibility while studying the speed of matter. This is how many terms like entropy and flux have entered physics.

Everything we do every day, and everything we use has energy involved. Sometimes using energy, sometimes consuming energy, sometimes gaining energy. Eating food every day, from there we get energy. Again working, there we spend that earned energy. But how much energy do we have in this energy source? Are they infinite or limited? Both types of energy exist in nature. Which we know as renewable and non-renewable energy.

Renewable energy
In simple words, the energy which can never run out or be exhausted from the energy source is called renewable energy. We have a very limited amount of renewable energy sources of this nature. Hydroelectricity, solar energy, wind energy, biofuels, and geothermal energy are examples.

Non-renewable energy
The energy that will run out or be exhausted from the source of energy is called non-renewable energy. Most of our energy sources of this nature are non-renewable. Examples are natural gas, mineral resources, and nuclear power.

Examples of non-renewable energy
Mineral Energy

The largest source of energy in the world is oil, gas, or coal. Millions of years ago, plants were buried under the ground and took this form due to long-term heat and pressure. Coal, oil, and gas have to be extracted from the ground. The oil that comes from underground is called crude oil. Crude oil is very dense in its initial state. In refineries, they are refined into gasoline, diesel, or kerosene and more usable substances are released. It may seem that we are constantly receiving mineral oil, thus we will continue to receive this energies. But this power will end one day. So mineral energy is a non-renewable energy.

Nuclear power

Many countries are using nuclear energy, there is also a need for a type of fuel, that fuel is uranium. Oil, Gas, Coal, or Uranium, these energies have one thing in common, when they are used, they are consumed. How much oil, gas, and coal is there under the ground, or how much uranium is there in the earth, people have guessed it. It has been seen that if the people of the world continue to use energy at the rate they are using, then the energy source of the world with oil, gas, coal or uranium will last for two hundred years. Then we will run out of known sources. The people of the world are not too worried about what will happen then, because people know for sure that something else will be brought out by using science and technology.

Examples of renewable energy
solar energy
You will be surprised to hear that in just one square kilometer area, nearly a thousand megawatts of energy is available from the sun as light and heat. Which is close to the power of a nuclear power plant. But a large part of the light and heat from the sun is lost in the atmosphere. Apart from that, the energy comes as heat or light, it has to go through many steps to convert into electricity. Where a huge amount of energy is consumed. Still, it is a very reliable power source. Because we will continue to get this energy from the sun. That is, this energy will not end. It is one of the renewable energy sources.

Geothermal energy
Another important source of renewable energy is geothermal energy. As we go deeper into the earth’s surface, the temperature of that layer will continue to rise due to the pressure on its top. If it continues like this, due to the high pressure in a deep layer, all the material there turns into a molten lava-like material. When these elements inside our earth come out through volcanoes, we understand the existence of these elements. So if one can dig a few kilometers into the hole then one gets a huge source of heat energy. The process is not yet simple, so it is not widely used. In some places, due to their geography, where such power is easily available, they have started to be used. This is one example of renewable energy.

Hydroelectric power
One-fifth of the world’s energy is renewable energy. A large part of that is hydropower. That is to make electricity by damming the river. Since the water of the river does not run out, the power source of such a power plant does not run out.
However, if the river is dammed, the environment will be greatly damaged. Because of that, the people of the world have become very cautious. Those who have little foresight do not build such hydroelectric plants.

Digital marketing is a technique that refers to the promotion of products or services through digital channels, such as search engines, websites, social media, email, mobile apps, and other platforms. It is a form of marketing that leverages the internet and digital technologies to reach and engage potential customers, build brand awareness, and drive sales.

The goal of digital marketing is to connect with consumers where they spend the most time, which is increasingly on digital devices and platforms. This requires marketers to adopt new strategies and techniques that can effectively reach and engage customers online. Some common digital marketing tactics include search engine optimization (SEO), pay-per-click advertising (PPC), content marketing, influencer marketing, social media marketing, email marketing, and mobile marketing.