How to optimize illustration sizes easily + quickly? And why optimize illustration sizes at all?

A photo weighing 5 MB on the Internet is madness. So how do you optimize illustration sizes easily and quickly?

...But why optimise illustration sizes at all?

1. Not everyone has fast internet, so heavy illustrations take a long time to load.
2. The longer the loading time, the less likely it is that there will be a "yes, I agree" reaction. We all don't like slow pages, with emails and files taking a very long time to open.
3. Sometimes some files and pages/emails don't even open when the files are very large.

Where does it apply? Do you need to worry about it?

1. If you send the photo to the final recipient (e.g. not a designer, but a Member of Parliament, a successor of a project, a prominent influencer) - care is needed.
2. If you are creating a web site - care is needed.
3. If you're not sending an email to a designer - care is needed.
4. If you send a few via social networks or messenger apps - NO care needed (these apps optimise themselves).

Which illustration is too big?

In general, anything over 1MB in weight. And the size in pixels itself is irrelevant.

How to optimise easily?

https://tinypng.com/

Simply upload the file (or files), click on optimise and you get the optimised file.
The appearance of the file will be unchanged, but the weight will be many times less.

P.S. Why is it still important to optimise files?

It's not just about our customers. It's also about the fact that every one of your files uses electricity and very limited mineral resources, which produces large amounts of CO2 and other pollution. Every one of your files, no matter how small, makes a real difference to the world. If you really want to help the environment and yourself, consider your Internet culture.