Meaningful website Image Name
If you are going to insert the image into website page then before that check the image name. Make sure image name is same as paragraph description. for example if you are talking about packers then use the word packers into images name.
By doing this your image will appear into right search result of Google.
Related ALT tags of images
After inserting the images into web page add the ALT tags which also related to topic of the page content. Add small description of 5-15 words about image view.
Mobile friendly image name
Image should be not too large for mobile devices make sure page is mobile responsive. If image is large then visitor lest your page and bounce rate increased. Use bootstrap classes to make image size according to device.
Compress Your Images
A large resolution image will take too much time to load on device. Compress the JPG and PNG images. Use latest webp extension to load the images fast into browser.
Yet apple device not fully supported the webp extension. some time on smartphone visitor close the website due to long loading time.
So compress the image size so that it load on device very fast. Lots of Wordpress
tools also available which compress the images.