Do you know how to use the blur effect on Instagram????

Open Instagram. It’s an orange and pink app with a white camera icon, typically located on your home screen (iPhone/iPad) or in the app drawer (Android).
If prompted, enter your Instagram username and password, then tap Log In.

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Tap the New Post button. It’s the square with a plus sign (+) at the bottom-center part of Instagram.

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Select an image and tap Next. It’s at the top-right corner of the screen.

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Tap Edit. It’s at the bottom of the screen.

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Scroll right and tap Tilt Shift. It’s the next-to-last editing option.

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Select a blur effect. Choose one of the two options and then edit as desired.
Radial: This selection adds blurring at the corners of the screen, leaving a round area at the center that remains clear.
Slide your finger across the photo to focus on the subject area.
Pinch your fingers in or out to adjust the size of the blurring effect.
Linear: This selection leaves a linear area of the photo clear while blurring everything else.
Slide your finger across the photo to choose the subject area.
Pinch your fingers in or out to adjust the size of the blurring effect.
Tap and rotate your two fingers to rotate the linear area.

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Tap Done. It’s at the bottom of the screen.

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Share your photo. Type a caption into the text box, if desired, then tap Share. Your blurred photo will now appear in your Instagram feed.
You can edit photos you take or upload from your phone’s library. Once you’ve taken or uploaded a photo, tap Next then tap Edit at the bottom of the screen. Learn more about the effects you can create:

Tap Adjust to change the photo’s vertical or horizontal perspective.
Tap Brightness to make your photo brighter or darker.
Tap Contrast to make the bright areas of your photo brighter and the dark areas darker.
Tap Structure to bring out the detail and texture in your photo.
Tap Warmth to shift the colors of your photo towards warmer orange tones or cooler blue tones.
Tap Saturation to increase or decrease the color intensity of the image (ex: adjust up to make the red redder).
Tap Color to add a color (yellow, orange, red, pink, purple, blue, cyan or green) to either the shadows or highlights of your photo. Tap the color you want to use twice to adjust the strength of the color.
Tap Fade to give your photo an aged look.
Tap Highlights to adjust the focus on the bright areas of the image.
Tap Shadows to adjust focus on the dark areas of the image.
Tap Vignette to darken the edges of the photo. Adding a vignette can direct the attention away from the edges towards the center of the photo.
Tap Sharpen to add crispness to your photo and make the photo appear clearer.