What are the ways to improve your WordPress site’s speed?

[Madagaskar]

Could you recommend me the ways to improve my WordPress site’s speed?
One of my colleagues suggested me these tips:
- Optimize images for speed on FLATsite (https://flatsite.com/)
- Use faster plugins
- Choose a theme that’s optimized for speed
So, i need to consult with you on what way is right for me and why.
Any inputs?

[lishmalinyjames]

compress the image size. it may help to improve your site's s speed.

[Querrido]

Based on the number of positive reviews from users who have been with them for a long time, can say that you can rely on them.
FLATsite.com started to offer SPECIAL: pay $1 for the first month! - https://flatsite.com/pricing/

[Akshay_M]

To Speed Up Your WordPress Site

Run performance tests.
Choose a reliable hosting provider.
Update everything.
Use the latest version of PHP.
Delete unused plugins.
Install high-quality plugins only.
Use a lightweight theme.
Optimize images.